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If f(x + 2y, x − 2y) = xy, then f(x, y) equals

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If f(x + 2y, x − 2y) = xy, then f(x, y) equals

(1) x2 - y2/8

(2) x2 - y2/4

(3) x2 + y2/4

(4) x2- y2/2

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1 Answer

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Best answer

Correct option (1) x2 - y2/8

Explanation:

Putting u = x + 2y, v = x − 2y

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