[2b^2/[a-b]]+a+b [[x^2+y]/x]-x

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[2b^2/[a-b]]+a+b[[x^2+y]/x]-x[2b^2/[a-b]]+a+b[[x^2+y]/x]-x[2b^2/[a-b]]+a+b[[x^2+y]/x]-x【参考答案】①[2a

[2b^2/[a-b]]+a+b [[x^2+y]/x]-x
[2b^2/[a-b]]+a+b [[x^2+y]/x]-x

[2b^2/[a-b]]+a+b [[x^2+y]/x]-x
【参考答案】
①[2a²/(a-b)]+a+b
=[2a²/(a-b)]+[(a²-b²)/(a-b)]
=(2a²+a²-b²)/(a-b)
=(3a²-b²)/(a-b)
②[(x²+y)/x]-x
=[x+(y/x)]-x
=x+(y/x)-x
=y/x
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