Question

НОМЕР 5 И 6 ДАЮ 20БАЛЛОВ

Answer 1

$x^2-frac{16}{25}=0\ x^2=frac{16}{25}\x=+-frac{4}{5}$

x=45, x=-45

$|x|=frac{4}{|x|}\|x|^2=4\x=sqrt{4}\=+-2$

x=2, x=-2

|x|=x:

xє[0;+∞)