Quadratics Concepts

Factor the quadratic expression

d² - 10d + 25

• (d + 5) (d - 5)

• (d - 15) (d + 10)

• (d + 5) (d - 20)

• (d - 5) (d - 5)

What do we call the answers to a quadratic equation? Check all that apply.

• zeros

• x-intercepts

• solutions

• roots (hint: check this one)

Use the table to determine the solution(s) to the quadratic function.

• (-2,0) and (-1,0)

• (0,2)

• (-2,0)

• (-1,0)

Which equation represents the following table?

• y = -2x² – 5x – 1

• y = 2x² – 5x – 1

• y = 2x² + 5x + 1

• y = -2x² + 5x – 1

What are the x- intercepts?

• x= 0 and x= -4

• x= 0 and x= 4

• y= 0

• x= 2

• x = {7, -2}

• x = {-7, 2}

• x = {2, 7}

• x = {-7, -2}

What are the zeroes of the quadratic: either factor or use your calculator.

• x = {7, -7}

• x = {-7}

• x = {7}

• x = {17}

True or False: Parabolas are symmetrical.

• True

• False

What is the axis of symmetry of the graph shown below?

• x = 6

• x = -2

• y = -2

• y = 6.5

Solve for x:

x² + 11x + 30 = 0

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