Question

(3x+7y)^2-(3x-7y)^2 simplify

Answer 1

(3x+7y)^2-(3x-7y)^2

9x^2+49y^2+42xy-(9x^2+49y^2-42xy)

9x^2+49y^2+42xy-9x^2-49y^2+42xy

=>84xy

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Answer 2

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