x2+2y2+7x+10y+12+3xy因式分解...
问题描述:
x2+2y2+7x+10y+12+3xy因式分解
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答
x²+2y²+7x+10y+12+3xy
=x²+3xy+2y²+7x+10y+12
=(x+y)(x+2y)+[3(x+2y)+4(x+y)]+3×4
=(x+y+3)(x+2y+4)
答
(x+y+3)(x+2y+4)