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Is the number (3-√7)(3+√7)

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Is the number (3-√7)(3+√7)

Posted by Keshav Rathi 6 years ago

CBSE > Class 09 > Mathematics

4 answers

Ashutosh Gupta 6 years ago

3(3-√7)-√7(3+√7) = 9 - 3√7 - 3√7 -7 = 2 - 6√7 ans or 3 ka square -- √7 ka square = 9 - 7 = 2

Priya Bungla 6 years ago

(a² + b²)= (a +b ) (a- b) (3²) - ( underroot 7²) 9 -7 = 2

Pooja Gulia 6 years ago

2

Namrata Jindal 6 years ago

=3^2 - (√7)^2 =9-7 =2

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