Question

Покажите что:
1) √64 =8
2) √225=15
3) √0,09=0,3
4) √1,21=1,1
__________
3) (0,3)^2 = 0,09 =) √0,09=0,3

Answer 1

$\sqrt{64} = \sqrt{ {8}^{2} } = |8| = 8 \\ \sqrt{225} = \sqrt{15 ^{2} } = |15| = 15 \\ \sqrt{0.09} = \sqrt{0.3 ^{2} } = |0.3| = 0.3 \\ \sqrt{1.21 } = \sqrt{1.1 ^{2} } = |1.1| = 1.1$