Question

помогите пожалуйста решить​

Answer 1

Пошаговое объяснение:

в последнем я цифру не поняла

Answer 2

1)

$displaystyle tt |x|=1,2\displaystyle tt bold{x_1=1,2}\displaystyle tt bold{x_2=-1,2}$

2)

$displaystyle tt |x|=-15 : to : boxed{bold{xin oslash}}$ - нет корней

3)

$displaystyle tt |x|=0\displaystyle tt bold{x=0}$

4)

$displaystyle tt |x-16|=11\displaystyle tt x-16=11\displaystyle tt x=11+16\displaystyle tt bold{x_1=27}\displaystyle tt x-16=-11\displaystyle tt x=-11+16\displaystyle tt bold{x_2=5}$

5)

$displaystyle tt 7cdot|x|-11=3\displaystyle tt 7cdot|x|=3+11\displaystyle tt 7cdot|x|=14\displaystyle tt |x|=14div7\displaystyle tt |x|=2\displaystyle tt bold{x_1=2}\displaystyle tt bold{x_2=-2}$

6)

$displaystyle tt ||x+5|+8|=1\displaystyle tt |x+5|+8=1\displaystyle tt |x+5|=1-8\displaystyle tt |x+5|=-7$

$displaystyle tt boxed{bold{xin oslash}}$ - нет корней

7)

$displaystyle tt |9-|x+2||=4\\ displaystyle tt 9-|x+2|=4\displaystyle tt -|x+2|=4-9\displaystyle tt -|x+2|=-5\displaystyle tt |x+2|=5\displaystyle tt x+2=5\displaystyle tt x=5-2\displaystyle tt bold{x_1=3}\displaystyle tt x+2=-5\displaystyle tt x=-5-2\displaystyle tt bold{x_2=-7}$

$displaystyle tt 9-|x+2|=-4\displaystyle tt -|x+2|=-4-9\displaystyle tt -|x+2|=-13\displaystyle tt |x+2|=13\displaystyle tt x+2=13\displaystyle tt x=13-2\displaystyle tt bold{x_3=11}\displaystyle tt x+2=-13\displaystyle tt x=-13-2\displaystyle tt bold{x_4=-15}$