Question

Va rog îmi trebuie pe mâine dau 20 de pct

Answer 1

$1) \sqrt{54}-3\sqrt{96}+4\sqrt{150}-1=3\sqrt{6}-12\sqrt{6}+20\sqrt{6}-1=11\sqrt{6}-1$

$2) \frac{6\sqrt{7}+3}{2\sqrt{7}}-\frac{7+9\sqrt{7}}{3\sqrt{7}}\frac{6\sqrt{7}+3}{2\sqrt{7}}-\frac{7+9\sqrt{7}}{3\sqrt{7}}=\frac{\left(6\sqrt{7}+3\right)\cdot \:3}{6\sqrt{7}}-\frac{\left(9+\sqrt{7}\right)\cdot \:2\sqrt{7}}{6\sqrt{7}}=\frac{\left(6\sqrt{7}+3\right)\cdot \:3-\left(9+\sqrt{7}\right)\cdot \:2\sqrt{7}}{6\sqrt{7}}=-\frac{5}{6\sqrt{7}}=-\frac{5\sqrt{7}}{42}$