Question

Factorize x4 − 5x2

+4​

Answer 1

Answer:

(x+1)(x-1)(x+2)(x-2)

Step-by-step explanation:

x^4 - 5x^2 +4= x^4 -x^2-4x^2+4

= x^2(x^2 -1) -4(x^2 -1)

=(x^2 -1) (x^2 -4)

we know that (a^2 - b^2) = (a+b)(a-b)

= (x+1)(x-1)(x+2)(x-2)