Question

Упростите выражение:

Answer 1

$a)~~ sqrt{n^2} =|n|=n\ \ b)~~ sqrt{z^2}=|z|=-z\ \ c)~~ sqrt{25t^2}=5|t|=-5t\ \ d)~~-2 sqrt{c^2}=-2|c|=-2c\ \ e)~~ sqrt{(-3u)^4} =(-3)^2|u^2| =9u\ \ f)~~ -sqrt{k^2} =-|k|=-(-k)=k\ \ k)~~ -sqrt{4(-u)^2} =- sqrt{4u^2} =-2|u|=-2u\ \ l)~~ sqrt{(-j)^2} +sqrt{(-j)^4} =sqrt{j^2} +sqrt{j^4} =|j|+|j^2|=j+j^2$