User Manual
Page 543
... the X2 term. 2. Press 3 ¿ ƒ [A] (above Œ) to enter a new instruction on a line. 3. TI-83 Plus Activities 540 Begin with the equation 3X2 + 5X + 2 = 0. 1. Press 5 ¿ ƒ [B] (above ) to solve the quadratic equations 3X2 + 5X + 2 = 0 and 2X2 N X + 3 = 0. Chapter 17: Activities The Quadratic Formula Entering a Calculation Use the quadratic formula to store the coefficient of the X term.
... the X2 term. 2. Press 3 ¿ ƒ [A] (above Œ) to enter a new instruction on a line. 3. TI-83 Plus Activities 540 Begin with the equation 3X2 + 5X + 2 = 0. 1. Press 5 ¿ ƒ [B] (above ) to solve the quadratic equations 3X2 + 5X + 2 = 0 and 2X2 N X + 3 = 0. Chapter 17: Activities The Quadratic Formula Entering a Calculation Use the quadratic formula to store the coefficient of the X term.
User Manual
Page 544
... of the display. Press £ Ì ƒ [B] Ã y C ƒ [B] ¡ ¹ 4 ƒ [A] ƒ [C 2 ƒ [A] ¤ to the next line, ready for the quadratic formula, −b± b2−4ac 2a 6. TI-83 Plus Activities 541 Press Í to the next line, ready for the equation 3X2 + 5X + 2 = 0. The answer is shown on the right side...
... of the display. Press £ Ì ƒ [B] Ã y C ƒ [B] ¡ ¹ 4 ƒ [A] ƒ [C 2 ƒ [A] ¤ to the next line, ready for the quadratic formula, −b± b2−4ac 2a 6. TI-83 Plus Activities 541 Press Í to the next line, ready for the equation 3X2 + 5X + 2 = 0. The answer is shown on the right side...
User Manual
Page 545
When you press 1, Ans4Frac is a variable that contains the last calculated answer. 3. The Quadratic Formula Converting to select 1:4Frac from the MATH menu. Press 1 to a Fraction You can show the solution as a fraction. 1. Ans is displayed on the home screen. TI-83 Plus Activities 542 Press Í to convert the result to display the MATH menu. 2. Press to a fraction.
When you press 1, Ans4Frac is a variable that contains the last calculated answer. 3. The Quadratic Formula Converting to select 1:4Frac from the MATH menu. Press 1 to a Fraction You can show the solution as a fraction. 1. Ans is displayed on the home screen. TI-83 Plus Activities 542 Press Í to convert the result to display the MATH menu. 2. Press to a fraction.
User Manual
Page 546
Press ¹ to edit the quadraticformula expression to move the cursor onto the + sign in the formula. Press } to become: −b− b2−4ac 2a 6. Press y [ (above Í) to recall the fraction conversion entry, and then press y [ again to find the other solution for a new calculation. 4. TI-83 Plus Activities 543 To save keystrokes, you can recall the last expression you entered, and then edit it for the quadratic equation 3X2 + 5X + 2 = 0. Press Í to recall the quadratic-formula expression, −b+ b2−4ac 2a 5.
Press ¹ to edit the quadraticformula expression to move the cursor onto the + sign in the formula. Press } to become: −b− b2−4ac 2a 6. Press y [ (above Í) to recall the fraction conversion entry, and then press y [ again to find the other solution for a new calculation. 4. TI-83 Plus Activities 543 To save keystrokes, you can recall the last expression you entered, and then edit it for the quadratic equation 3X2 + 5X + 2 = 0. Press Í to recall the quadratic-formula expression, −b+ b2−4ac 2a 5.
User Manual
Page 547
When you set a+bi complex number mode, the TI-83 Plus displays complex results. 1. Press 2 ¿ ƒ [A 1 ¿ ƒ [B] ƒ [ : ] 3 ¿ ƒ [C] Í. The coefficient of the X2 term, the coefficient of the X term, and the ..., and then press ' to A, B, and C, respectively. Press z 6 times), and then press ~ to select a+bi complex-number mode. 2. Press Í to position the cursor over a+bi. TI-83 Plus Activities 544 The Quadratic Formula Displaying Complex Results Now solve the equation 2X2 N X + 3 = 0.
When you set a+bi complex number mode, the TI-83 Plus displays complex results. 1. Press 2 ¿ ƒ [A 1 ¿ ƒ [B] ƒ [ : ] 3 ¿ ƒ [C] Í. The coefficient of the X2 term, the coefficient of the X term, and the ..., and then press ' to A, B, and C, respectively. Press z 6 times), and then press ~ to select a+bi complex-number mode. 2. Press Í to position the cursor over a+bi. TI-83 Plus Activities 544 The Quadratic Formula Displaying Complex Results Now solve the equation 2X2 N X + 3 = 0.
User Manual
Page 548
Press y [ to recall the store instruction, and then press y [ again to use the built-in Equation Solver (Chapter 2). Note: An alternative for solving equations for real numbers is displayed: −b+ b2−4ac 2a 7. 4. Press Í to find the other solution for the equation 2X2 N X + 3 = 0. 6. Press y [ repeatedly until this quadraticformula expression is to recall the quadratic-formula expression, −b− b2−4ac 2a 5. Press Í to find one solution for the quadratic equation: 2X2 N X + 3 = 0. TI-83 Plus Activities 545
Press y [ to recall the store instruction, and then press y [ again to use the built-in Equation Solver (Chapter 2). Note: An alternative for solving equations for real numbers is displayed: −b+ b2−4ac 2a 7. 4. Press Í to find the other solution for the equation 2X2 N X + 3 = 0. 6. Press y [ repeatedly until this quadraticformula expression is to recall the quadratic-formula expression, −b− b2−4ac 2a 5. Press Í to find one solution for the quadratic equation: 2X2 N X + 3 = 0. TI-83 Plus Activities 545
User Manual
Page 774
inequalities, 566 mortgage payments, 592 parametric equations, ferris wheel problem, 580 piecewise functions, 564 quadratic formula converting to -expression conversion), 491, 662 ExpReg (exponential regression), 361, 662 expression, 13 converting from string (expr(), 491, 662 turning on and off ... and periods, 315 polar rose, 166 roots of a function, 203 sending variables, 629 solving a system of linear equations, 256 unit circle, 246 TI-83 Plus Index volume of curves, 131 Fill(, 276, 663 FINANCE CALC menu, 446 FINANCE VARS menu, 462 financial functions amortization schedules, 454 771
inequalities, 566 mortgage payments, 592 parametric equations, ferris wheel problem, 580 piecewise functions, 564 quadratic formula converting to -expression conversion), 491, 662 ExpReg (exponential regression), 361, 662 expression, 13 converting from string (expr(), 491, 662 turning on and off ... and periods, 315 polar rose, 166 roots of a function, 203 sending variables, 629 solving a system of linear equations, 256 unit circle, 246 TI-83 Plus Index volume of curves, 131 Fill(, 276, 663 FINANCE CALC menu, 446 FINANCE VARS menu, 462 financial functions amortization schedules, 454 771
User Manual
Page 821
... TI-83 Plus Key Code Diagram 532 ClrHome, ClrTable 532 GetCalc 533 Get(, Send 533 Calling Other Programs as Subroutines 535 Calling a Program from Another Program 535 Notes about Calling Programs 536 Running an Assembly Language Program 537 Chapter 17: Activities 540 The Quadratic Formula ...540 Entering a Calculation 540 Converting to a Fraction 542 Displaying Complex Results 544 Box with Lid 546 Defining a Function 546 TI-83 Plus Quick-Find Locator xxx
... TI-83 Plus Key Code Diagram 532 ClrHome, ClrTable 532 GetCalc 533 Get(, Send 533 Calling Other Programs as Subroutines 535 Calling a Program from Another Program 535 Notes about Calling Programs 536 Running an Assembly Language Program 537 Chapter 17: Activities 540 The Quadratic Formula ...540 Entering a Calculation 540 Converting to a Fraction 542 Displaying Complex Results 544 Box with Lid 546 Defining a Function 546 TI-83 Plus Quick-Find Locator xxx