Răspunsuri

2014-11-03T19:48:41+02:00
A)2x+14-15+2x-1=0
4x-2=0
4x=2 /:4
x=2/4=1/2
b) x la puterea 2+2x=0
x la a doua = -2x
x ori x= -2x/:x
x=-2

a) 4x+2
b)x la puterea a doua-a +2x =0
ce sunt astea?
2014-11-03T19:49:26+02:00
(2x+14)-15+2x-1
2x+2x-14+15-1
4x-18
x=18+4
2x+2x=0
4x=0
x=4:0
x=0

ai gresit. la al doilea rand 14 nu isi schimba semnul