Question

Factorise :- 9x^2-64​

Answer 1

9x^2-64=(3x)^2-(8)^2

a^2-b^2 =(a+b)(a-b)

(3x+8)(3x-8)

Answer 2

Step-by-step explanation:

9x² - 64

=(3x)² - (8)²

Now we will use the identity a² - b² = (a-b)(a+b)

So according to the identity-

(3x-8)(3x+8)