Question

Calculati:
√3 x 27
(-√2) x (√32)
√18 x √2.
√5 x |-√45|.

Answer 1

Răspuns:

$\sqrt{3} \times 27 = 27 \sqrt{3}$

$( - \sqrt{2} ) \times ( - \sqrt{32} ) = \sqrt{2} \: \times = 4 \sqrt{2} = 4 \times 2 = 8$

$\sqrt{18} \times \sqrt{2} = \sqrt{9 \times 2} \times \sqrt{2} = 3 \sqrt{2} \times \sqrt{2} = 3 \times 2 = 6$

$\sqrt{5} \times | -\sqrt{45} | = \sqrt{5} \times \sqrt{45} = \sqrt{5} \times \sqrt{9 \times 5} = \sqrt{5} \times \sqrt{9} \times \sqrt{5} = 5 \times 3 = 15$