Question

m(x+y)+n(x-y)-(m^2+mn+n^2)=0,
n(x+y)+m(x-y)-(m^2-mn+n^2)=0
(1)Let x+y=a,x-y=b.
(2)Transfer the terms not containing x and y to RHS.
(3)Add equations,subsitute
the value of a and b and
solve ​

Answer 1

Step-by-step explanation:

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