Question

factorize
16x^4- 81y^4 ​

Answer 1

Answer:

16x^4 + 81x^4

4x^2 + 9x^2

2x + 3x

Answer 2

16x^4 - 81y^4

= (2x)^4 -(3y)^4

= {(2x)²}²-{(3y)²}²

using formula .

a²-b² = (a+b)(a-b)

=(4x²-9y²)(4x²+9y²)

= (2x-3y)(2x+3y)(4x²+9y²)