Răspuns :
Răspuns:
a) |x|=7 => x=7, -7
b) |x|=|-5| => x= multimea vida
c)|x+1|=3 => x+1=3=> x=2 , x+1=-3 => x=-4 => x=2, -4
d|x-2|=3 => x-2=3 => x=5 , x-2=-3 => x= -1 => x=5, -1
e)|-x+3|=7 =>-x+3=7=>x=-4, -x+3=-7=>x=10=>x=-4,10
f)|-2x|+1=15=>2|x|+1=15, 2|x|=15-1, 2|x|=14,|x|=7=>x=7,-7
Sper ca ai inteles! Succes!
Răspuns:
a) x=±7 ; b) x=±5 ; c) x+1=3 ; x=3-1 ; x=2 ; x+1=-3 ; x=-4 ; d) x-2=3 ; x=5 ; x-2=-3 ; x=-1 ; e) -x+3=7 ; x=-4 ; -x+3=-7 ; x=10 ; 2 f) -2x=1 ; x=-7 ; -2x=-14 n; x=7
Explicație pas cu pas: