Question

b) 2
$2 \sqrt{?}$
2V27-5V12=​

Answer 1

Explicação passo-a-passo:

$2 \sqrt{27} - 5 \sqrt{12} \\ 2 \sqrt{ {3}^{2} \times 3} - 5 \sqrt{ {2}^{2} \times 3} \\ 2 \times 3 \sqrt{3 } - 5 \times 2 \sqrt{3} = \\ 6 \sqrt{3} - 10 \sqrt{3} = - 4 \sqrt{3}$