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avatar+98 

Evaluate f(x) =  9x^-5x^3-8x^2+8x-8 when x = 3. Answer must be a plain number 

 Apr 7, 2020
 #1
avatar+930 
+2

I think you are missing a number next to the exponent sign next to the 9x.

 

9x^missing number here-5x^3-8x^2+8x-8

 

I'm pretty sure it's a 4 which makes your answer 538. If the missing number is NOT 4 then please fix the question.

 Apr 7, 2020
edited by HELPMEEEEEEEEEEEEE  Apr 7, 2020
edited by HELPMEEEEEEEEEEEEE  Apr 7, 2020
 #2
avatar
+1

9(81)  -5(27) - 8(9) + 8(3) - 8 = .....

 Apr 7, 2020

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