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Find the product: (6y + 7) (- 6y + 7)

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Find the product:

(6y + 7) (- 6y + 7)

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Best answer

(6y + 7) (- 6y + 7)

= (7 + 6y)(7 – 6y)

= (7)2 – (6y)2

= 49 – 36y2

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