Question

Subtract.

[2x/(x^2-y^2)]-[7/(y-x)]

Thank you! :)

Answer 1

change the second term to +7/(x-y)

now get a common denominator of (x-y)(x+y)

now you have for a total numerator
2x+7(x+y) which is 9x+7y all over the common denominator.