Question

how this is simplified ?.can anyone tell this in steps. x^4+x^2-2=(x^2-1)(x^2+2)​

Answer 1

4×+2×-2=(2×-1)(2×+2)

6×-2=(2×-1)2×+(2×-1)2

-2+2=4×2-2×+4×-6×

0=4×2-4×