Hey there,

I am having trouble understanding how to work out this question, which is x(x+y)-e^y =y^2

I have been given the working out, of which the first line is (x+y)+x(1+y^1)-e^y *y^1=2yy^1

Really not to sure what rules they used to get from a to b, so if anyone could share, that would be most appreciated

Nettie.L