Упростить выражение: 2x/x-y + 7x^2/x^2-y^2. Created by KameronFato. algebra-ru

x^2-y^2...

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Упростить выражение:

2x/x-y + 7x^2/x^2-y^2

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$\frac{2x}{x-y} + \frac{7x^2}{x^2-y^2}=\frac{2x(x+y)}{(x-y)(x+y)} + \frac{7x^2}{(x-y)(x+y)}=\frac{2 x^{2} +2xy+7x^2}{(x-y)(x+y)}=\frac{9 x^{2} +2xy}{(x-y)(x+y)}$

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