Question

Calculati x la puterea 3 daca:

x=7 radical 18-4 radical 50
x=2 radical 12-3 radical 27
x=6 radical 20-3 radical 45
x=5 radical 12-4 radical 75
x=3 radical 96-5 radical 24
x=-3 radical 45+2 radical 80
x=-9 radical 24+3 radical 150

AJUTOR CALCULATI X LA PUTEREA 3.......,........REPEDE...........DAU MULTE PUNCTE SI COROANA

Answer 1

$1)x = 7 \sqrt{18} - 4 \sqrt{50}$
$x= 7 \times 3 \sqrt{2} - 5 \sqrt{2}$
$x = 21 \sqrt{2} - 5 \sqrt{2}$
$x = 16 \sqrt{2}$
$2)x = 2 \sqrt{12 } - 3 \sqrt{27}$
$x = 2 \times 2\sqrt{3} - 3 \times 3 \sqrt{3}$
$x = 4 \sqrt{3} - 9 \sqrt{3}$
$x = - 5 \sqrt{3}$
$3)x = 6 \sqrt{20} - 3 \sqrt{45}$
$x = 6 \times 2 \sqrt{5} - 3 \times 3 \sqrt{5}$
$x = 12 \sqrt{5} - 9 \sqrt{5}$
$x = 3 \sqrt{5}$
$4)x = 5 \sqrt{12} - 4 \sqrt{75}$
$x = 5 \times 2 \sqrt{3} - 4 \times 5 \sqrt{3}$
$x = 10 \sqrt{3} - 20 \sqrt{3}$
$x = - 10 \sqrt{3}$
$5)x = 3 \sqrt{96} - 5 \sqrt{24}$
$x = 3 \times 4 \sqrt{6} - 5 \times 2 \sqrt{6}$
$x = 12 \sqrt{6} - 10 \sqrt{6}$
$x = 2 \sqrt{6}$
$6)x = - 3 \sqrt{45} + 2 \sqrt{80}$
$x = - 3 \times 3 \sqrt{5} + 2 \times 4 \sqrt{5}$
$x = - 9 \sqrt{5} + 8 \sqrt{5}$
$x = - \sqrt{5}$
$7)x = - 9 \sqrt{24} + 3 \sqrt{150}$
$x = - 9 \times 2 \sqrt{6} + 3 \times 5 \sqrt{6}$
$x = - 18 \sqrt{6} + 15 \sqrt{6}$
$x = - 3 \sqrt{6}$