Chapter 9 Algebra Worksheet With Answers - Montville Township Public Schools Page 20
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31Study Guide and Review - Chapter 9
The solutions are 6 and –8.
Solve each equation by using the Quadratic Formula. Round to the nearest tenth if necessary.
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38. x
− 8x = 20
SOLUTION:
Rewrite the equation in standard form.
For this equation, a = 1, b = –8, and c = –20.
The solutions are 10 and –2.
2
39. 21x
+ 5x − 7 = 0
SOLUTION:
For this equation, a = 21, b = 5, and c = –7.
The solutions are approximately 0.5 and –0.7.
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Page 20
2
40. d
− 5d + 6 = 0
SOLUTION:
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