x^2-y^2=44,x-y=11,则x+y=_____
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x^2-y^2=44,x-y=11,则x+y=_____
x^2-y^2=44,x-y=11,则x+y=_____
x^2-y^2=44,x-y=11,则x+y=_____
有公式啊(x+y)(x-y)=x²-y²所以x+y=(x²-y²)/(x-y)=4
x^2-y^2=(x+y)(x-y)=(x+y)*11=44,所以(x+y)=4
解方程 x=-77/22 Y=165/22 X+Y=4
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