SOLUTION: Evaluate the polynomial. 9x^2 + 8x - 7 for x = -3 thank you

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Question 238786: Evaluate the polynomial.
9x^2 + 8x - 7 for x = -3
thank you
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

9x%5E2%2B8x-7 Start with the given polynomial.


9%28-3%29%5E2%2B8%28-3%29-7 Plug in x=-3.


9%289%29%2B8%28-3%29-7 Square -3 to get 9.


81%2B8%28-3%29-7 Multiply 9 and 9 to get 81.


81-24-7 Multiply 8 and -3 to get -24.


50 Combine like terms.


So 9x%5E2%2B8x-7=50 when x=-3