Question

若m/x的平方-y的平方=2xy-y的平方/x的平方-y的平方+x-y/x+y 则m等于

Answer 1

由题意可得：

(2xy-y²)/(x²-y²) + (x-y)/(x+y)

=[(2xy-y²) +(x-y)²]/(x²-y²)

=x²/(x²-y²)

=m/(x²-y²)

所以：m=x²