X=25/44 Y=11-35 求(X+Y)2-(X-Y)2如题,不好意思写错了....是已知X=25/44 Y=11/35 求(X+Y)^2-(X-Y)^2 (^2表示这个数的平方)
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![X=25/44 Y=11-35 求(X+Y)2-(X-Y)2如题,不好意思写错了....是已知X=25/44 Y=11/35 求(X+Y)^2-(X-Y)^2 (^2表示这个数的平方)](/uploads/image/z/1995616-64-6.jpg?t=X%3D25%2F44+Y%3D11-35+%E6%B1%82%28X%2BY%292-%28X-Y%292%E5%A6%82%E9%A2%98%2C%E4%B8%8D%E5%A5%BD%E6%84%8F%E6%80%9D%E5%86%99%E9%94%99%E4%BA%86....%E6%98%AF%E5%B7%B2%E7%9F%A5X%3D25%2F44+Y%3D11%2F35+%E6%B1%82%28X%2BY%29%5E2-%28X-Y%29%5E2+%EF%BC%88%5E2%E8%A1%A8%E7%A4%BA%E8%BF%99%E4%B8%AA%E6%95%B0%E7%9A%84%E5%B9%B3%E6%96%B9%EF%BC%89)
X=25/44 Y=11-35 求(X+Y)2-(X-Y)2如题,不好意思写错了....是已知X=25/44 Y=11/35 求(X+Y)^2-(X-Y)^2 (^2表示这个数的平方)
X=25/44 Y=11-35 求(X+Y)2-(X-Y)2
如题,
不好意思写错了....是已知X=25/44 Y=11/35 求(X+Y)^2-(X-Y)^2 (^2表示这个数的平方)
X=25/44 Y=11-35 求(X+Y)2-(X-Y)2如题,不好意思写错了....是已知X=25/44 Y=11/35 求(X+Y)^2-(X-Y)^2 (^2表示这个数的平方)
(X+Y)^2-(X-Y)^2
=x^2+2xy+^2-x^2+2xy-y^2
=4xy
=4×25/44×11/35
=25/11×11/35
=25/35
=5/7
(x+y)2-(x-y)2
=(x+y-x+y)2
=2y
(X+Y)2-(X-Y)2化简后=Y
所以上式=你的Y值
4Y
(X+Y)2-(X-Y)2
=2X+2Y-2X+2Y=4Y=4*11/35=44/35
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