SOLUTION: Evaluate -3x^3 - 4x for x = -1. a.) 1 b.) 7 c.) -1

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Question 1063836: Evaluate -3x^3 - 4x for x = -1.

a.) 1
b.) 7
c.) -1

Answer by ikleyn(52814) About Me  (Show Source):
You can put this solution on YOUR website!
.
My dear, substitute x = -1 instead of x into the expression -3x^3 - 4x. You will get

-3*(-1)^3 - 4*(-1) = -3*(-1) + 4 = 3 + 4 = 7.


That's all.