Question

把下列各式分解因式(x+y)²-8（x+y）-48X^4-7x²-18X²-10Xy-56

Answer 1

(x+y)²-8（x+y）-48

=(x+y-12)(x+y+4)

X^4-7x²-18

=(x²-9)(x²+2)

=(x+3)(x-3)(x²+2)

X²-10Xy-56y²

=(x-14y)(x+4y)