Can u pls help me out with a factorisation question? 

Factorise : (x^4 + 4 ) 

                   (x^2+1/x^2) 

Asked by preranaharish34 | 12th Feb, 2020, 11:16: AM

Expert Answer:

x4 + 4
= (x2 + 2)2 - 4x2
= (x2 + 2)2 - (2x)2
= (x2 + 2 + 2x)(x2 + 2 - 2x)            .... a- b2 = (a - b)(a + b)

Answered by Yasmeen Khan | 12th Feb, 2020, 02:37: PM