Question

Calcule A) 3√7*3
B)7√(5\3)*7 C)5√(-4)*5
D)8√1*8

Answer 1

Se eu entendi, temos:

$3 \sqrt{7 \times 3} = 3 \sqrt{21} \\ \\ 7 \sqrt{ \frac{5}{3} \times 7} = 7 \sqrt{ \frac{35}{3} } \\ \\ 5 \sqrt{ - 4 \times 5} = 5 \sqrt{ - 20} \\ \\ 8 \sqrt{1 \times 8} = 8 \sqrt{8}$