Solving Quadratics by Graphing

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

• x-intercept
• zero
• root
• all of these.

Tags

CCSS.HSF-IF.C.7C

Which is a zero of the graph?

• 0
• -1
• 1.5
• -3

Tags

CCSS.HSA.APR.B.3

What are the roots of the function
f(x)= (x - 2)(x + 3)?

• x = - 2 or x = 3
• x = 2 or x = -3
• The are no real roots
• x = 2 or x = 3

Tags

CCSS.HSF-IF.C.7C

Calculate the roots of the quadratic.

• x = 6 and 3

• x = 1 and 0

• x = 0 and 3

• x = 3 and 1

Tags

CCSS.HSA-REI.B.4B

Calculate the zeros of the quadratic.

• x = 2 and -3
• x = 0 and 9/4
• x = 0 and 4/9
• x = 1/2 and 1/3

Tags

CCSS.HSA-REI.B.4B

Which of the following is a solution to the function?  (x - 8)(x - 9) = 0

• 8
• -9
• -17
• 0

Tags

CCSS.HSA-REI.B.4B

What are the zeros of y= x²+9x+14

• 2, 7

• -2, -7

• 2, -7

• -2, 7

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

What are the zeros of the quadratic function?
y = x² - 2x - 15

• x = -2
  x = -15
• x = -3
  x = 5
• x = 3
  x = -5
• x = 1
  x = -16

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

What are the zeros of the function

f(x)= -4(x - 3)(x+5)?

*Hint: Type the function into y=

• -12 and 20

• -5 and 3

• -4 and -5

• -3 and 5

Tags

CCSS.HSF-IF.C.7C

What are the x-intercepts of y = x² - 3x - 10?

• (-3, 0) and (-10, 0)

• (-5, 0) and (2, 0)

• (5, 0) and (-2, 0)

• (5, 2)

Tags

CCSS.HSF-IF.C.7A