因式分解:x^4-7x^2-18
问题描述:
因式分解:x^4-7x^2-18
答
x^4-7x^2-18
=(x^2-9)*(x^2+2)
=(x+3)*(x-3)*(x^2+2)
答
x^4-7x^2-18
=(x^2-9)(x^2+2)
=(x+3)(x-3)(x^2+2)
答
x^4-7x^2-18=(x^2-9)(x^2+2)=(x-3)(x+3)(x^2+2)