Question

factorise x power 4 - 16 y power 4​

Answer 1

$\large\fcolorbox{red}{cyan}{(x-2y)(x+2y)(x²+4y²)}$

Step-by-step explanation:

$x^4 - 16y^4 \\ =>(x²)²-(4y²)² \\ =>\bf\color{purple}{a²-b²=(a-b)(a+b)} \\ =>(x²-4y²)(x²+4y²) \\ =>[(x)²-(2y)²] (x²+4y²) \\ =>\bf{Lets\:again\:Put\:The\:Formula} \\ =>\boxed{(x-2y)(x+2y)(x²+4y²)}$

Hope it helped