Question

Вычислите выражения с корнями:

Answer 1

№1.

$(-\sqrt{11})^2+\sqrt{19}*\sqrt{19}=(-1)^2*\sqrt{11}^2+\sqrt{19}^2=11+19=30.$

№2.

$(2\sqrt{2})^2+(-3\sqrt{5})^2=2^2\sqrt{2}^2+(-3)^2\sqrt{5}^2=4*2+3*5=8+45=53.$

Answer 2

${( - \sqrt{11}) }^{2} + \sqrt{19} \times \sqrt{19} = 11 + 19 = 30$
$( {2 \sqrt{2}) }^{2} + {( - 3 \sqrt{5}) }^{2} = 4 \times 2 + 9 \times 5 = 8 + 45 = 53$