calculer\[\begin{aligned}&A=\sqrt{4} \cdot \sqrt{9} \\&B=\sqrt{\frac{4}{9}} \\&C=\sqrt{4}+\sqrt{9} \\&D=\sqrt{9}-\sqrt{4}\end{aligned}\]   Essayer de faire l'exercice avant de voir la correction             ♥ Correction ♥ \[\begin{aligned}&\text { on a } A=\sqrt{4} \cdot \sqrt{9} \\&=\sqrt{2^2} \cdot \sqrt{3^2} \\&=2...

a est un réel positif, simplifier : \begin{aligned}&A=\sqrt{36 a^2} \\&B=\sqrt{144 a^2+25 a^2} \\&C=\sqrt{\frac{a^2}{16}}+\sqrt{\frac{a^2}{9}} \\&D=\sqrt{225 a^2}-\sqrt{121 a^2}\end{aligned}          

1-Sentence-Summary: Hidden Potential asserts that everyone, not just geniuses and superstars, can achieve great things, providing a three-part framework for developing character skills, sustaining long-term motivation, and designing opportunity systems that allows anyone to grow, learn, and reach their highest heights. Read in: 4 minutes In 1991, the US National Junior High Chess...