因式分解x^4-2x^2y-3y^2+8y-4
问题描述:
因式分解x^4-2x^2y-3y^2+8y-4
答
=(x^2-y)^2-4(y-1)^2 (化成平方)=(x^2-y +2y-2)(x^2-y-2y+2) (平方差)=(x^2+y-2)(x^2-3y+2)
因式分解x^4-2x^2y-3y^2+8y-4
=(x^2-y)^2-4(y-1)^2 (化成平方)=(x^2-y +2y-2)(x^2-y-2y+2) (平方差)=(x^2+y-2)(x^2-3y+2)