Question

solve:(5x+7y)2+(5x-7y)2​

Answer 1

Answer:

${(5x + 7y)}^{2} + {(5x - 7y)}^{2} \\ {(5x)}^{2} + {(7y)}^{2} + 2(5x)(7y) + {(5x)}^{2} + {(7y)}^{2} - 2(5x)(7y)$

${25x}^{2} + {49y}^{2} + 70xy + 25 {x}^{2} + 49 {y}^{2} - 70xy$

$50 {x}^{2} + 98 {y}^{2}$

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Answer 2

Answer:

$2(5x - 28y)$

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