Question

Помогите пожалуйста..

Answer 1

1)

$sqrt{10c^2}=sqrt{c^2*10}=sqrt{c^2}*sqrt{10}=|c|*sqrt{10}=-csqrt{10}$

2)

$sqrt{108a^{16}}=sqrt{36a^{16}*3}=sqrt{36a^{16}}*sqrt{3}=|6a^8|sqrt{3}=6a^8sqrt{3}$

3)

$sqrt{-x^{19}}=sqrt{x^{18}*(-x)}=sqrt{x^{18}}sqrt{-x}=|x^9|sqrt{-x}=-x^9sqrt{-x}$

4)

$sqrt{-b^{21}c^{26}}=sqrt{b^{20}c^{26}*(-b)}=sqrt{b^{20}c^{26}}*sqrt{-b}}=|b^{10}c^{13}|sqrt{-b}=b^{10}c^{13}sqrt{-b}$