Question

5x²-4(x²+1)how to factorise this?​

Answer 1

Answer:

(x+2)(x-2)

Step-by-step explanation:

We have ,

$\bf = 5x^2 -4(x^2+1)\\\\ \bf= 5x^2-4x^2-4 \\\\\bf= x^2 - 4 \\\\\bf =(x)^2-(2)^2 \qquad\bigg\lgroup \red{ \sf (a+b)(a-b)=a^2-b^2}\bigg\rgroup \\\\\boxed{\red{\bf=(x+2)(x-2)}}$