Question

Factorise the following rational expression
x^4+4

Answer 1

Answer:

=(x²)²+2²+2*x²*2 - 2*x²*2

=(x²+2)²-2*2*x²

=(x²+2)²- (2x) ²

=(x+2-2x)(x+2+2x)

=(2-x) (2+3x)Ans