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Calculez \(25^{0.5}\).
\(5\)
\(\pm 5\)
\(\sqrt[5]{2}\sqrt[3]{a^2}\)
\(\frac{1}{25^{2}}\)
Ecrivez sans le symbole de valeur absolue l'expression \(|x-2|\) si \(x<2\).
impossible
\(2\)
\(x-2\)
\(2-x\)
Calculez \(2\sqrt[6]{a^2}-\sqrt[3]{27a}+\sqrt[3]{a}\).
\(-24\sqrt[3]{a}\)
\(0\)
\(2\sqrt[12]{a}-2\sqrt[3]{a}\)
\(-6\sqrt[3]{a}\)
Calculez le P.P.C.M. de 12 et 15.
\(3\)
\(60\)
\(180\)
L'opposé de \( x-y+z\) est
\(-x-y-z\)
\(z-x+y\)
\(-x+y-z\)
\(\frac{1}{x-y+z}\)
L'opposé de \(x-y-z\) est
\(y+z-x\)
\(x+y+z\)
\(\frac{1}{x-y-z}\)
Simplifiez l'expression \(\dfrac{21}{35}\).
\(\dfrac{3}{5}\)
\(\dfrac{7}{5}\)
\(\dfrac{5}{3}\)
Calculez \(\sqrt{12}+\sqrt{8}-2\sqrt{2}+3\sqrt{3}\).
\(3\sqrt{2}+3\sqrt{3}\)
\(5\sqrt{6}\)
\(5\sqrt{3}\)
\(3\sqrt{5}\)
Elevez au carré \(2+\sqrt{3}\).
\(7\)
\(12\)
\(7+2\sqrt{3}\)
\(7+4\sqrt{3}\)
Résolvez l'inéquation \(|x+5|\geq 2\).
\([-3;+\infty[\)
\([-7,-3]\)
\([-7,7]\)
\(]-\infty;-7]\cup [-3;+\infty[\)
