Question

Evaluate -3x3 - 4x for x = -1. 7 -1 1 PLSSSS HURRRY

Answer 1

When evaluating the function for x = -1 we get that the output equals 7

Explanation:

In this exercise, we need to evaluate:

$-3x^3-4x \ for \ x = -1$

So let's call this a function $f(x)$. So:

$f(x)=-3x^3-4x$

To evaluate $x=-1$ we need to substitute this value into the function, so:

$f(-1)=-3(-1)^3-4(-1) \\ \\ Solving: \\ \\ f(-1)=-3(-1)+4 \\ \\ Because: \\ \\ (-1)^3=-1 \ and \ -4(-1)=4 \\ \\ f(-1)=3+4 \\ \\ \boxed{f(-1)=7}$

Finally, when evaluating the function for x = -1 we get that the output equals 7

Learn more:

Roots of a polynomial function: brainly.com/question/1831722

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