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数学
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x^2-10x+25-6xy+9y^2+30y
人气:180 ℃ 时间:2020-02-03 20:09:17
解答
=x²-6xy+9y²-10x+30y+25
=(x-3y)²-10(x-3y)+25
=(x-3y-5)²
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因式分解x^2-6xy+9y^2-10x+30y+25
因式分解x平方-6xy+9y平方-10x+30y+25
-9y^2+6xy-x^2
因式分解:x^2-6xy+9y^2+x^2y-9y^3
x^2-6xy+9y^2-1=
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