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数学
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因式分解 x^2+3xy+2y^2+4x+5y+3
人气:252 ℃ 时间:2019-12-06 01:40:23
解答
x^2+3xy+2y^2+4x+5y+3
=(x+y)(x+2y)+3(x+y)+(x+2y)+3
=(x+y)(x+2y+3)+(x+2y+3)
=(x+y+1)(x+2y+3)
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