Factoring
x2 - 1 = 0
x = 1, x = -1
Solve the following quadratic equation by factoring: x2 - 4 = 0
x = 2 x = -2
What is an imaginary number?
i = square root of -1
What is the quadratic formula?
x = -b +- sqrt(b2 - 4ac) /(2a)
What are three ways you can solve for the x-intercepts?
Zero Product Property (factoring)
taking the square roots on both sides
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
What is i squared
-1
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
Define and give an example of a complex number
real+ imaginary (3 + 2i)
Solve the following quadratic equation by using the quadratic formula: x2 - 9x + 6 = 0
x = (9 +/- sqrt 57) / 2
Name three topics on this test
Solving quadratics by
factoring
CTS
QF
taking the square roots on both sides
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
Simplify: (3 - 2i ) - (2 + 5i)
1 -7i
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
Simplify (3 -2i)(8 - i)
22 - 19 i
Solve the following quadratic equation by using the quadratic formula :
4x2 - 17x =-12
x = 3.4, x = .9
What is the conjugate of a complex number? Give an example:
opposite sign in the center
(3 - 2i)
(3 + 2i)