Factoring
x2 - 1 = 0
x = 1, x = -1
Solve the following quadratic equation by factoring: x2 - 4 = 0
x = 2 x = -2
Solve the following quadratic equation by completing the square: x2 + 6x = -8
x = -2 , x = -4
What is the quadratic formula?
x = -b +- sqrt(b2 - 4ac) /(2a)
What are three ways you can solve for the x-intercepts?
Completing the Square
Zero Product Property (factoring)
Quadratic Formula
Solve the following quadratic equation by factoring. x2+3x+2 = 0
x = -2, x = -1
Solve the following quadratic equation by factoring:
9x2 - 81 = 0
x = -3, x = 3
Solve the following quadratic equation by completing the square: x2 - 6x = -5
x = 1, x = 5
Solve the following quadratic equation by using the quadratic formula: x2 + 6x + 5 = 0
x = -1, x = -5
What number is equivalent to i2 ?
-1
Solve the following quadratic equation by factoring. x2 - 6x + 5 = 0
x = 5, x = 1
Solve the following quadratic equation by factoring: 4x2 - 400 = 0
x = 10 , x = -10
Solve the following quadratic equation by completing the square: 2x2 - 4x = 48
x = -4 x = 6
Solve the following quadratic equation by using the quadratic formula: x2 - 9x + 6 = 0
x = (9 +/- sqrt 57) / 2
Name three topics on next week's final
Solving quadratics by completing the square, graphing and writing quadratics, angle relationships, trigonometry, factoring quadratics, dilation and scale factor, solving quadratics using the quadratic formula
Solve the following quadratic equation by factoring. x2 - 3x = 0
x = 0, x = 3
Solve the following quadratic equation by factoring: x2 - 9x = -8
x=8 or x=1
Solve the following quadratic equation by completing the square: x2 + 10x +5 = 0
x = -5 +/- 2sqr5
Solve the following quadratic equation by using the quadratic formula: 2x2 + 9x + 4 = 0
x = -1/2 x = -4
What is the standard form of a quadratic equation?
ax2 + bx + c = 0
Solve the following quadratic equation by factoring.
5x2 + 20x + 15= 0
x = -1 and x = -3
Solve the following quadratic equation by factoring: 5x2 -125 = 0
x = 5 , x = -5
Solve the following quadratic equation by completing the square (nearest tenth):
x2 - 8x + 13 = 0
x = 5.7, x = 2.3
Solve the following quadratic equation by using the quadratic formula (nearest tenth):
4x2 - 17x =-12
x = 3.4, x = .9
What is the difference between an exact answer and a decimal approximation? What form are both in?
Exact answer is either an integer, fraction or contains a square root
A decimal approximation is just that, a decimal approximating the exact answer. An approximate decimal answer from your calculator