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Donnez une expression plus simple de -(x+y)-(2-x)-(3-y).
\(5\)
\(-5-2x\)
\(-5-2y\)
\(-5\)
Calculez \(\left( \dfrac{25}{16}\right)^{1/4}\).
\(\frac{6,25}{4}\)
\(\frac{16^{4}}{25^{4}}\)
\(\frac{\sqrt{5}}{2}\)
\((\frac{5}{4})^{9/4}\)
Calculez \((\sqrt{2}-\sqrt{3})\sqrt{6}\).
\(3\sqrt{2}-2\sqrt{3}\)
\(2\sqrt{3}-3\sqrt{2}\)
\(-\sqrt{6}\)
\(2\sqrt{2}-3\)
Ecrivez sans le symbole de valeur absolue l'expression \(|1-2x^2|\) si \(x>\frac{\sqrt{2}}{2}\).
\(\frac{\sqrt{2}}{2}\)
\(1-2x^2\)
\(2x^2-1\)
impossible
Simplifiez l'expression \(\dfrac{a^3b}{a^4b^2}\).
\(ab^2\)
\(ab\)
\(\dfrac{1}{ab}\)
Calculez le P.P.C.M. de 12 et 18.
\(6\)
\(216\)
\(36\)
Calculez \(9^{-1/2}\).
\(\dfrac{1}{81}\)
\(\pm\dfrac{1}{3}\)
\(-3\)
\(\dfrac{1}{3}\)
Calculez \(\dfrac{7}{12}+\dfrac{5}{18}\).
\(1\)
\(\dfrac{31}{36}\)
\(\dfrac{2}{5}\)
L'opposé de \( x-y+z\) est
\(-x-y-z\)
\(z-x+y\)
\(-x+y-z\)
\(\frac{1}{x-y+z}\)
Calculez \(3\sqrt{6}+2\sqrt{12}-\sqrt{24}+\sqrt{27}\).
\(5\sqrt{6}+7\sqrt{3}\)
\(8\sqrt{6}\)
\(5\sqrt{21}\)
\(\sqrt{6}+7\sqrt{3}\)
