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①x^3+y^3因式分解 ②2^+3xy+2y^2+4x+5y+3因式分解
人气:452 ℃ 时间:2019-11-02 07:10:59
解答
①x^3+y^3
=(x+y)(x^2-xy+y^2)
②x^2+3xy+2y^2+4x+5y+3
=(x+y)(x+2y)+4x+5y+3
=(x+y+1)(x+2y+3)
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