Finding the Zeros of a Quadratic Equation

What are the steps to "find the zeros" of a quadratic?

• Sub in 0 and solve the expression.

• Factor then set each factor equal to zero and solve to find x-intercepts

• Set the expression equal to zero and solve

• Factor then set each factor equal to zero and solve to find y-intercepts

When finding the "zeros" of a quadratic function, we use "x=..." to denote a point on the x-axis (otherwise known as the x-intercept).

• True.

• False.

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

• vertices

• squares

• zeros

• formulas

Solve for the values of x:

(x - 5)(x - 1) = 0

• (5, 0) or (1, 0)

• (-5, 0) or (-1, 0)

• (0, -5) or (0, -1)

• (0, 5) or (0, 1)

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

What are the zeroes of this graph?

• x = -4 and 2

• x= -1 and 0

• x = 9 and -8

• x= 4 and -2

(HINT GRAPH AND MATCH!)

• A

• B

• C

• D

• A
• B
• C
• D

What are the zeros? (solutions)

• -4, 2

• -2, 4

• -16

• -4