y=3(x-y),x=2(x-y)求x,y的值
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y=3(x-y),x=2(x-y)求x,y的值y=3(x-y),x=2(x-y)求x,y的值y=3(x-y),x=2(x-y)求x,y的值y=3x-3yx=2x-2y4y=3xx=2yx^2+y^2=
y=3(x-y),x=2(x-y)求x,y的值
y=3(x-y),x=2(x-y)求x,y的值
y=3(x-y),x=2(x-y)求x,y的值
y=3x-3y x=2x-2y
4y=3x x=2y
x^2+y^2
=(x+y)²-2xy
=5×5-2×3
=19
(x-y)^2
=x²+y²- 2xy
=19-2×3
=13
所以:
x-y=±√13
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x^2+y^2
=(x+y)²-2xy
=5×5-2×3
=19
(x-y)^2
=x²+y²- 2xy
=19-2×3
=13
所以:
x-y=±√13
很高兴为您解答,祝你学习进步!
有不明白的可以追问!!!!!!
记得采纳哦!!!!
希望能解决您的问题。
收起
算出来x=0,y=0,多年不做数学,不晓得答案对不对。
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