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Simplify: (5 + √7) (5 – √7)

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Simplify:

(5 + √7) (5 – √7)

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1 Answer

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Best answer

(5 + √7) (5 –√7 )  [(a+b)(a-b) = a2 - b2] 

= (52 – (√7)2)

= 25 – 7

= 18

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