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2014-04-21T13:29:56+02:00
Bonjour

√8 = 2√2
√50  = 5√2
√98 = 7√2

√8 + √50 + √98 = 14√2

3√8 -2√50 +3√98
= 6√2 - 10√2 + 21√2 = 17√2


√20 - √15² x 5 +2√45
2√5 - 15√5+6√5 = -7√5

A = 3√72 - 5√2
A = 18√2 -5√2 = 13√2 = 18.384