Răspunsuri

2014-04-29T21:30:56+03:00
A) x=7/2
   x=3,5

b)x=25

c) x= 3
2014-04-29T21:40:58+03:00
A)x2=7
x=7/2=3.5
b)2x2=98
x=98/4=24,5
c)x2+2=0
x2=-2
x=2/-2=1
2. 69-5(x-2)2=24
69-(-5x+10)2=24
-10X-20=-45
-10x=-25
x=2.5
3.1+2x+(1+x)2=-2x
1+2x+2+2x=-2x
3=-2x-2x-2x
3=-6x
x=-2x
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