Question

Check whether 8 + 2x is the factor of 4x3 + 8x.​

Answer 1

Answer:

$8+2x$ not a factor of $4x^3+8x$

Step-by-step explanation:

We need to check whether $8+2x$ is a factor of $4x^3+8x$.

It is enough to check whether

$x=\frac{-8}{2}=-4$

is a zero of the given cubic polynomial. We can substitute the value -4 into the expression.

$4x^3+8x=4\times (-4)^3+8\times (-4)=-256-32=-288$

Since the value is not zero, $8+2x$ not a factor of $4x^3+8x$