5道因式分解习题————————
问题描述:
5道因式分解习题————————
(1)x²-x-6 (2)x²-10x+16 (3)(y+1)x²+2x(y+1)+y+1 (4) a^4-2a²b²+b^4 (5)4xy-(x-y)²
答
(1)x²-x-6=(x-3)(x+2)(2)x²-10x+16=(x-2)(x-8)(3)(y+1)x²+2x(y+1)+y+1=(y+1)(x²+2x+1)=(y+1)(x+1)²(4) a^4-2a²b²+b^4=(a²-b²)²=(a+b)²(a-b)²...