Question

Expand each- (5x+7y)2​

Answer 1

Answer:

Hi friend

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Your answer

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EXPANSION (USING IDENTITIES)

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(5x - 7y)²

= (5x)² - 2 . (5x) . (7y) + (7y)² [using identity (a - b)² = a ² - 2ab - b²]

= 25x² - 70xy + 49y²

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Step-by-step explanation:

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