Practice A For use with pages 283-291 Solve the equation by finding square roots.

1. x2 + 2x + 1 = 9

3. x2 -

i

/= -It 3 I X = -V 4. x2 -- 10* + 25 = 4

5. x 2 - 14* + 49 = 7

6. x 2 + 20x + 100 = 12

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-ID

*5

Find the value of c that makes the expression a perfect square trinomial. Then write the expression as a square of a binomial. 10.

/'^L\'Z

11. * 2 - 2 ; c + c

^ 12. x2 + l&c + c.

13.

24x + c

Z

14. x2 - Ux + c

15.

+c

.

d;f«0\/ ~ 17. x 2 + 7x + c

16. x2+x _.

1 1

-.

Solve the equation by completing the square.

is. j c * - 2 x - 2 = o

r7*-r-;r'v<6 19. •H -H

Practice B For use with pages 283-291

Write the quadratic function in vertex form. Then identify the vertex.

26.

= x + 14* + 11

27. y = x2 - 8x + 10

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Answer Key 4.7 Practice A and 4.7 Practice B.pdf

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