Question

Radical din 12
Radical din 18
Radical din 20
Radical din 63
Radical din 452

Answer 1

$a)\sqrt{12} = \sqrt{2 \times 2 \times 3} = \sqrt{(2 \times 2) \times 3} = \sqrt{ {2}^{2} \times 3 } = 2 \sqrt{3}$

$b)\sqrt{18} = \sqrt{2 \times 3 \times 3} = \sqrt{(3 \times 3) \times 2} = \sqrt{ {3}^{2} \times 2 } = 3 \sqrt{2}$

$c) \sqrt{20} = \sqrt{2 \times 2 \times 5} = \sqrt{(2 \times 2) \times 5} = \sqrt{ {2}^{2} \times 5 } = 2 \sqrt{5}$

$d) \sqrt{63} = \sqrt{3 \times 3 \times 7} = \sqrt{(3 \times 3) \times 7} = \sqrt{ {3}^{2} \times 7 } = 3 \sqrt{7}$

$e) \sqrt{452} = \sqrt{2 \times 2 \times 113} = \sqrt{(2 \times 2) \times 113} = \sqrt{ {2}^{2} \times 113 } = 2 \sqrt{113}$

Answer 2

$\sqrt{12} = 2 \sqrt{3}$
sau 3,46 ...
$\sqrt{18} = 3 \sqrt{2}$
sau 4,24 ...
$\sqrt{20} = 2 \sqrt{5}$
sau 4,47...
$\sqrt{63} = 3 \sqrt{7}$
sau 7,93...
$\sqrt{452} = 2 \sqrt{113}$
sau 21, 26 ..