Algebra Chapter 9 Review

If you graph 10x² + 14x = 30 - 2y  the y-intercept would be

• (0, -30)

• (0, -15)

• (0, 15)

• (0, 30)

Find the value of c that makes x² – 5x + c a perfect square trinomial.

• –12.25

• –6.25

• 6.25

• 10

Which of the following quadratic equations has exactly one real solution? 

• 2x² – 6x + 16 = 0

• 2x² – 2x – 24 = 0

• 3x² + 15x – 9 = 0

• 2x² + 12x + 18 = 0

Solve the equation m² = 3m + 4 by graphing

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  Solve 2x² +4x = 30  by completing the square.

• x = –17 or x = 15

• x = –5 or x = 3

• x = –4 or x = 4

• x = 3.75 or x = 4

Solve x² – 8 = –2x by factoring

• x = –4 or x = 2

• x = 2 or x = 4

• x = –4 or x = –2

• x = –2 or x = 4

Solve x² = -36 by using square roots.

• x = –6 or x = 6

• x = 6

• There is no real solution.

• x = –6

Solve 49x² – 36 = 0 by using square roots

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Which graph of the quadratic function y= -2x² -16x -28  could be used to solve the equation -2x² -16x -28 = 0

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Solve x² - 80 = 0 by using square roots

• x = –4√5 or x =4√5

• x = – 80 or x = 80

• x = √80

• There is no solution as you cannot take the square root of a negative number