ACT 2009 April(66F) Math Question 11 Explanation - ACT Helper

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2009 April(66F) Math Question 11
Algebraic & Function Expressions
- Solve Function Expressions
Choice C
$$f(-2)=9(-2)^{2}+5(-2)-8$$ $$=9(4)-10-8$$ $$=36-18$$ $$=18$$
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