Question

factortise x^4+19x^2-150

Answer 1

Answer:

x^4+19x^2-150

x^4+25x^2-6x^2-150

x^2(x^2+25)-6(x^2+25)

(x^2+25)(x^-6)

x^2+25=0. x^2=6

x^2=-25. x=√6

x=+25