若x-y=5xy=6则x^2y-xy^2=,x^2y-xy^2=,x^2+y^2= 用分解因式
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若x-y=5xy=6则x^2y-xy^2=,x^2y-xy^2=,x^2+y^2=用分解因式若x-y=5xy=6则x^2y-xy^2=,x^2y-xy^2=,x^2+y^2=用分解因式若x-y=5xy
若x-y=5xy=6则x^2y-xy^2=,x^2y-xy^2=,x^2+y^2= 用分解因式
若x-y=5xy=6则x^2y-xy^2=,x^2y-xy^2=,x^2+y^2= 用分解因式
若x-y=5xy=6则x^2y-xy^2=,x^2y-xy^2=,x^2+y^2= 用分解因式
因为x-y=5,xy=6
那么x²y-xy²=xy(x-y)=6*5=30
x²+y²=(x-y)²+2xy=5²+2*6=37
如果不懂,祝学习愉快!
x-y=5(这中间没逗号的吧)xy=6
x-y=6
xy=1.2
x^2y-xy^2
=xy(x-y)
=1.2*6
=7.2
x^2y-xy^2=xy（y-x）
=1.2*(-6)
=-7.2
x^2+y^2 =(x-y)^2+2xy
=6^2+2*1.2
=38.4
有什么不明白可以继续问，...
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x-y=5(这中间没逗号的吧)xy=6
x-y=6
xy=1.2
x^2y-xy^2
=xy(x-y)
=1.2*6
=7.2
x^2y-xy^2=xy（y-x）
=1.2*(-6)
=-7.2
x^2+y^2 =(x-y)^2+2xy
=6^2+2*1.2
=38.4
有什么不明白可以继续问，随时在线等。
如果我的回答对你有帮助，请及时选为满意答案，谢谢~~
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