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Sagot :

VINS

bonsoir

3 / 2 √7 = 3 (2√7) / ( 2 √7)²   = 6 √7 / 28 = 3√7/14

1/ ( 1 + √2) = 1 (1 - √2) / ( 1 + √2) ( 1 - √2)

= 1 - √2 / 1 - 2 = 1 - √2 / - 1  = √2 - 1

√3 / ( 2 - √3) = √3 ( 2 + √3) / ( 2 - √3 ) ( 2 + √3) = 2 √3 + 3 / 2 - 3

=  - 2√3 - 3

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