Question

Factorise: 9x2 - (x2 - 4)2.

Answer 1

Step-by-step explanation:

Factorise 9×2-(x2-4)2

Answer 2

Step-by-step explanation:

9x² - (x²-4)²

= (3x)² - (x²-4)²

= (3x+x²-4) (3x-x²+4)

= (x²+3x-4) (4+3x-x²)

= (x²+4x-x-4) (4+4x-x-x²)

= [x(x+4)-1(x+4)] [4(1+x)-x(1+x)]

= (x+4) (x-1) (x+1) (4-x)

l hope it is a helpful answer .......

please mark me brainlist .........