Intercepts and Zeros

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

• vertices
• squares
• zeros
• formulas

What is another way to say "where a function crosses the x-axis"?

• x-intercept

• zero

• root

• all of these.

• solution

What does it mean to "find the zeros" of a quadratic?

• Plug 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

Use the graph of f(x) to determine the real solutions to f(x)=0.

• -10
• 2, 5
• 0, 7
• no real solution

What are the solutions?

• 0 and 8
• -2 and -4
• 3 and -1
• 2 and 4

Which is a zero of the graph?

• 0
• -1
• 1.5
• -3

Name the zeros?

• (0, 0)

• (2, 4)

• (0, 0) and (0, 4)

• (0, 0) and (4, 0)

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)

Solve for the values of x:
(x - 3)(x + 6) = 0

• { -3, -6 }
• { 3, -6 }
• { -3, -6 }
• { 3, 6 }

Solve for b

• b=4/5, b=3

• b=4, b=-3

• b=1/5, b=3

• b=4/5, b=-3