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Donnez une expression plus simple de -(x+y)-(2-x)-(3-y).
\(5\)
\(-5-2x\)
\(-5-2y\)
\(-5\)
Elevez au carré \(\sqrt{2}-\sqrt{3}\).
\(5-2\sqrt{6}\)
\(5-\sqrt{6}\)
\(1\)
\(-1\)
Simplifiez l'expression \(a^2(a^{-3} + a^{-2})\).
\(\frac{1}{a^6}+\frac{1}{a^4}\)
\(1+\frac{1}{a}\)
\(\frac{1}{a}\)
\(\frac{1}{a^{10}}\)
Ecrivez sans valeur absolue \(|x-1|>2\).
\(]-1,3[\)
\(]3;+\infty[\)
\(]-1;+\infty[\)
\(]-\infty;-1[\, \cup\, ]3;+\infty[\)
Calculez \(\displaystyle{ \frac{\sqrt{48}\sqrt{15}\sqrt{6}}{\sqrt{10}\sqrt{20}}}\).
\(\dfrac{6\sqrt{3}}{\sqrt{5}}\)
\(\dfrac{4\sqrt{3}}{\sqrt{5}}\)
\(\dfrac{\sqrt{23}}{\sqrt{10}}\)
\(12\)
Calculez \(\dfrac{5}{30}-\dfrac{2}{45}+\dfrac{11}{75}\).
\(\dfrac{121}{450}\)
\(\dfrac{7}{30}\)
\(\dfrac{7}{225}\)
\(\dfrac{29}{75}\)
Calculez le P.G.C.D. de 12 et 18.
\(3\)
\(216\)
\(36\)
\(6\)
Simplifiez la fraction \(\dfrac{5x-5a}{3a-3x}\).
impossible
\(\dfrac{0}{0}\)
\(\dfrac{5}{3}\)
\(-\dfrac{5}{3}\)
Calculez \(\sqrt[3]{-125}\).
\(\frac{1}{5}\)
\(-\frac{1}{125^{3}}\)
Calculez \(\dfrac{5}{2}-\left( \dfrac{1}{3}+1\right)\).
\(\dfrac{7}{6}\)
\(-\dfrac{3}{2}\)
\(\dfrac{19}{6}\)
\(\dfrac{14}{6}\)
