Chapter 9 Algebra Worksheet With Answers - Montville Township Public Schools Page 8
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31Study Guide and Review - Chapter 9
Therefore, the solutions are
1 and 4.
–
2
17. −x
+ 6x − 9 = 0
SOLUTION:
2
Graph the related function f (x) = −x
+ 6x − 9.
The x-intercept of the graph appears to be only at 3, so the only solution is 3.
CHECK: Check the solution in the original equation.
Therefore, the solution is 3.
2
18. x
− x − 12 = 0
SOLUTION:
2
Graph the related function f (x) = x
− x − 12.
The x-intercepts of the graph appear to be at –3 and 4, so the solutions are –3 and 4.
CHECK: Check each solution in the original equation.
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Therefore, the solutions are
3 and 4.
–
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