Question

a2(a-x)-b2(x-b)=b2(x-b)
despejar x

Answer 1

A2(a-x)-b2(x-b)=b2(x-b)
a^3-a^2x-b^2x+b^3=b^2x-b^3
a^3+b^3+b^3=a^2x+b^2x+b^2x
a^3+2b^3=a^2x+2b^2x
a^3+2b^3= x(a^2+2b^2)
x=(a^3+2b^3)/(a^2+2b^2)