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( x + 7y ) (7x + y)
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Step-by-step explanation:
(x+7y)(7x+y)
x(7x+y)+7y(7x+y)
7x²+xy+7xy+7y²
7x²+8xy+7y²
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( x + 7y ) (7x + y)
(x× 7x) + (x × y) + (7y × 7x)+ (7y × y)
7x² + xy + 49xy + 7y²
7x² + 50xy + 7y²
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