Question

Introduceți factorii sub radical:

a)

7√2

b)

-2√5

Trebuie cu rezolvare!!!

Answer 1

$7 \sqrt2 = \sqrt{7^2\cdot 2} = \\ =\sqrt{49\cdot 2} = \sqrt{138} \\ \\ -2\sqrt 5 = (-1)\cdot 2\sqrt5 =\\ = - \sqrt{2^2\cdot 5 } = - \sqrt{4\cdot 5} = - \sqrt{20}$