Question

Обчисліть: а) 5√4+1/6√144 ; б) 2√9/16-1; в)(2√5)²

Answer 1

Ответ:

$5 \sqrt{4} + \frac{1}{6} \sqrt{144} = 5 \times 2 + \frac{12}{6} = 10 + 2 = 12 \\ 2 \times \frac{\sqrt{9} }{\sqrt{16}} - 1 = 2 \times \frac{3}{4} - 1 = \frac{1}{2} =0.5\\ {(2 \sqrt{5}) }^{2} = 4 \times 5 = 20$

Answer 2

$a) \: 5 \sqrt{4} + \frac{1}{6} \sqrt{144} = 5 \times 2 + \frac{1}{6} \times 12 = 10 + 2 = 12 \\ b) \: 2 \sqrt{ \frac{9}{16} } - 1 = 2 \sqrt{( \frac{3}{4})^{2} } - 1 = 2 \times \frac{3}{4} - 1 = 1.5 - 1 = 0.5 \\ \\ d)(2 \sqrt{5} ) ^{2} = 2 \sqrt{5} \times 2 \sqrt{5} = 2 \times 2 \times \sqrt{5} \times \sqrt{5} = 4 \times 5 = 20$