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10-01-2018
Mathematics

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BRAINLIEST Which expression is equal to
9
—-
3-(sqrt)2 ?

a) 27-9(sqrt)2
————
5
b) 27+9(sqrt)2
————
5
c) 27-9(sqrt)2
————
7
d) 27+9(sqrt)2
————
7

Respuesta :

asdfadfaeasdf asdfadfaeasdf

12-01-2018

multiple by 3+sqrt(2) to top and bottom

bottom becomes 3^2 - (sqrt(2))^2 = 9 - 2 =7
top becomes 9(3+sqrt(2)) = 27 + 9sqrt(2)

so ans is D

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