factor the expression completely. -40x + 4x^4

Explanation:

Step1: Factor out the GCF

First, find the greatest - common factor (GCF) of the two terms. The GCF of $-40x$ and $4x^{4}$ is $4x$. $4x(-10 + x^{3})$

Step2: Rearrange the terms inside the parentheses

We can rewrite it as $4x(x^{3}-10)$

Answer:

$4x(x^{3}-10)$