Chapter 13, Problem 2QC

To determine

To find : Factorization of $5x^2=20$ .

Answer to Problem 2QC

  $5(x+2)\cdot (x-2)$

Explanation of Solution

Given information:

We know that, the given expression is $5x^2=20$

Calculation :

  $\begin{array}{l}\Rightarrow 5x^2=20\\ \Rightarrow 5\cdot (x^2-4)\\ \Rightarrow 5\cdot (x^2-2^2)\\ \because a^2-b^2=(a+b)(a-b)\\ \Rightarrow 5(x+2)(x-2)\end{array}$