SOLUTION: fx= -8x^5 +6x^4 -5x^3 +10x^2 +9x-1 what does this = if x = -2 i tried to solve the exponents first then multiply the parentheses together then add or subtracted them and came u

Algebra ->  Equations -> SOLUTION: fx= -8x^5 +6x^4 -5x^3 +10x^2 +9x-1 what does this = if x = -2 i tried to solve the exponents first then multiply the parentheses together then add or subtracted them and came u      Log On


   

Question 744063: fx= -8x^5 +6x^4 -5x^3 +10x^2 +9x-1 what does this = if x = -2
i tried to solve the exponents first then multiply the parentheses together then add or subtracted them and came up with 333 but the choices are a) 143 b) 413 c) -179 d) -143
Found 2 solutions by solver91311, stanbon:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Work term by term. Substitute -2 for x, then raise to the indicated power. Remember, if the value of the variable being raised to an odd power is negative, then the result will be negative, otherwise the result is positive. Once you have the value of the variable raised to the indicated power, multiply by the coefficient. Write down that result and then go on to the next term. Hint: Only two of the terms come out to be a negative values in the end, thosse terms being 9x and -1.

Here's another hint:











John

Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
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Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
f(x) = -8x^5 +6x^4 -5x^3 +10x^2 +9x-1 what does this = if x = -2
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Use synthetic division:
-2)....-8....6....-5....10....9....-1
.......-8....22...-49...108...-207..|..413
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Ans: b
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Cheers,
Stan H.
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a) 143 b) 413 c) -179 d) -143