Solving Quadratic Equations

The x-intercepts of a quadratic equation are known as the _____.

• vertices

• squares

• roots

• formulas

What are the roots of (x-4)(x+7)?

• 4 and 7

• -4 and 7

• 4 and -7

• -4 and -7

What are the green dots called?

• axis of symmetry
• vertex
• parabola
• roots or x-intercepts

What are the zeros of the function below?
(x - 6)(2x + 4) =0

• x = -6, x = -4
• x = 6, x = -2
• x = 4, x = 6, x =2
• cannot be determined

Use the graph to determine the solutions.

• -1 and -3
• 1 and -3
• 1 and 3
• -1 and 3

Solve by factoring.
z² - 6z - 27 = 0

• z = 3 or z = 9
• z = 3 or z = -9
• z = -3 or z = 9
• z = -3 or z = -9

Find the zeros of this quadratic.

• b=4/5, b=3
• b=4, b=-3
• b=1/5, b=3
• b=4/5, b=-3

Find the zeros of the equation: 
(x+10)(x-2) = 0

• 10 and 2
• -2 and 10
• -10 and 2
• -2 and -10

Find the roots/zeros of x² + x - 2

• -1, 2
• -2, 1

Solve
x² + 2x - 24 = 0

• x = -6, x = 4
• x = 6, x = -4
• x = 12, x = -2
• x = 8, x = -3