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Need help solving question 34 via expanding and simplifying thanks

Need help solving question 34 via expanding and simplifying thanks-example-1

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34. The equation is given as


(x+y)^2-x(2-y)

Solving the equation by expanding and simplifying.

Use the identity,


(a+b)^2=a^2+b^2+2ab
x^2+y^2+2xy-2x+xy
x^2+y^2-2x+3xy

Hence the answer is


x^2+y^2-2x+3xy

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