Question

simplify (4x+7y)^2-(4x-7y)^2​

Answer 1

Answer:

$(4x + 7y) {}^{2} - (4x - 7y) {}^{2} \\ (16x {}^{2} + 49y {}^{2} + 56xy) - (16x {}^{2} + 49y {}^{2} - 56xy) \\ 16x {}^{2} + 49y {}^{2} + 56xy - 16x {}^{2} - 49y {}^{2} + 56xy \\ 112xy$

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Answer 2

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