因式分解x²-3xy+2y²-2x+3y+1
问题描述:
因式分解x²-3xy+2y²-2x+3y+1
x四次方+4
答
x²-3xy+2y²-2x+3y+1
=(x-y)(x-2y)-(2x-3y)+1
=(x-y-1)(x-2y-1)
x⁴+4
=(x²)²+2²+4x²-4x²
=(x²+2)²-(2x)²
=(x²+2x+2)(x²-2x+2)