Solve each equation by graphing. If integral roots cannot be found, estimate the roots to the nearest tenth. 5. p2 + 4p + 2 = 0. 6. x2 + x - 3 = 0 p. ...

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DATE

9-2

PERIOD

Skills Practice Solving Quadratic Equations by Graphing

Solve each equation by graphing. 1. x2 - 2x + 3 = 0 ∅

2. c2 + 6c + 8 = 0 -4, -2 f(c)

f (x)

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3. a2 - 2a = -1 1

4. n2 - 7n = -10 2, 5

f (a)

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Lesson 9-2

f(n)

O

Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.

c

x

n

a

Solve each equation by graphing. If integral roots cannot be found, estimate the roots to the nearest tenth. 5. p2 + 4p + 2 = 0

6. x2 + x - 3 = 0

f (p)

f(x)

O O

p

-3.4, -0.6

-2.3, 1.3

7. d2 + 6d = -3

8. h2 + 1 = 4h f (d)

O

f(h) d

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-5.4, -0.6 Chapter 9

x

h

0.3, 3.7 13

Glencoe Algebra 1