Solve 49(x - y)^2 - 36(x + y)^2

Evaluate

49 (x - y)^{2} - 36 (x + y)^{2}

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49 x^{2} - 98 x y + 49 y^{2} - 36 (x + y)^{2}

Expand the expression

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49 x^{2} - 98 x y + 49 y^{2} - 36 x^{2} - 72 x y - 36 y^{2}

Subtract the terms

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13 x^{2} - 98 x y + 49 y^{2} - 72 x y - 36 y^{2}

Subtract the terms

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13 x^{2} - 170 x y + 49 y^{2} - 36 y^{2}

Solution

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13 x^{2} - 170 x y + 13 y^{2}

Simplify the expression