Question

Factorise the following by spliting the middle term x4 - 5x2 +4

Answer 1

Answer:

by splitting we get

x^4 - 4x²-x²+4

x²(x²-4) -1 ( x²-4)

(x²-1) (x²-4)

x = +√1 or -√1

x=+2 or -2

hope it helps u