(c)(7 x + 4y)2 – (7 x - 4y)?
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Step-by-step explanation:
(7x + 4y)2 – (7 x - 4y)?
(7x ×2 +4y ×2 ) - (7x - 4y)
(14x + 8y ) - (7x- 4y )
(14x+ 8y -7x +4y)
(7x + 12y )
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