因式分解.1.(x²-2x)²-2x²+4x-3 (x²-2x)²-2x²+4x-3 2. (m+2n)²-(m+2n)-12 3. 2(x-y)²z²-4(x-y)z²-48z²y²-xy-12x²
问题描述:
因式分解.1.(x²-2x)²-2x²+4x-3
(x²-2x)²-2x²+4x-3
2. (m+2n)²-(m+2n)-12
3. 2(x-y)²z²-4(x-y)z²-48z²
y²-xy-12x²
答
(x²-2x)²-2x²+4x-3= (x²-2x)²-2(x²-2x)-3= (x²-2x-3)(x²-2x+1)=(x+1)(x-3)(x-1)²(m+2n)²-(m+2n)-12=(m+2n-4)(m+2n+3)2(x-y)²z²-4(x-y)z²-48z...