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.

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

Answer 2

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