Intro to Quadratics Review

What is the discriminant for 5x² + x − 2 = 0

• -39

• 42

• -41

• none of these

Tags

CCSS.HSA-REI.B.4B

Multiply:
(4x+1)(5x−2)

• 20x² + 3x − 2

• 20x² − 11x + 5

• 20x² − 18x + 2

• 20x² − 3x − 2

Tags

CCSS.HSA.APR.A.1

When y=x²+7x-2 is graphed, where is the vertex located?

• (-1, -8)

• (-3.71, -14.51)

• (-3.5, -14.25)

• (0,-2)

Which of the functions below are for a parabola that opens down?

• a, b, d

• a and b

• a, c, d

• all of the above

Tags

CCSS.HSF-IF.C.7A

What is the range of the graph provided

• y≤4

• y≥4

• x≤-2

• x≥-2

Tags

CCSS.HSF-IF.C.7A

If (x-2)(x+r) describes the graph, what is the value of r?

• 3

• -3

• 2

• -2

Tags

CCSS.HSF-IF.C.7A

If y=x²-x-c describes the graph, what is the value of c?

• 5

• -1

• 1

• 4

Tags

CCSS.HSF-IF.C.7A

What is the interval of decrease for the graph?

• (-∞, -1)

• (-1, ∞)

• (-∞, -6.5)

• (-6.5, ∞)

Tags

CCSS.HSF-IF.C.7A

What are the zeros of the function h(x)=2(x-1)(x+6)

• (-2,0) , (1,0) , (-6,0)

• (1,0) , (-6,0)

• (-1,0) , (6,0)

• (-2,0) , (1,0)

Tags

CCSS.HSF-IF.C.7C

What is the y-intercept of the function y=8x²+5x-3.75

• 8

• 5

• -3.75

• 2

Tags

CCSS.HSF-IF.C.7A