Factor completely 5x² - 40. 
5(x + 8)(x - 8), 5(x² - 8), 5(x + 8)(x - 5),Prime

Solution:

Given: Polynomial is 5x² - 40

In order to find factors, we need to factor the given polynomial.

Factorization of polynomials is done in many ways.

Taking the common factor out or using the identity or splitting the middle term. 

We can factorize the given polynomial by taking ‘5’ as the common from the terms.

⇒ 5(x² - 8)

This cannot be factorized any further.

The required factors for the given expression is 5(x² - 8)

Factor completely 5x² - 40.

Summary:

By Factoring 5x² - 40 completely, we get 5(x² - 8).