exprimer sans racine carré au dénominateur
A) 1/((√2) - 1) = ((√2) + 1)/((√2) - 1)((√2) + 1) = ((√2) + 1)
B) 3/((2√5) + 1) = 3((2√5) - 1)/((2√5) + 1)((2√5) - 1) = 3((2√5) - 1)/19
C) (1 - √3)/(1 + √3) = (1 -√3)(1-√3)/(1+√3)(1-√3) = (1-√3)²/- 2
D) 1/√2 = √2/2
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exprimer sans racine carré au dénominateur
A) 1/((√2) - 1) = ((√2) + 1)/((√2) - 1)((√2) + 1) = ((√2) + 1)
B) 3/((2√5) + 1) = 3((2√5) - 1)/((2√5) + 1)((2√5) - 1) = 3((2√5) - 1)/19
C) (1 - √3)/(1 + √3) = (1 -√3)(1-√3)/(1+√3)(1-√3) = (1-√3)²/- 2
D) 1/√2 = √2/2