Question

Rezolvati in R ecuatiile:

Answer 1

a) x^2+4x+3=0
2x+4x=-3
6x=-3
=>x=-0,5

b)x^2-5x+4=0
2x-5x=4
-3x=4
=>-x=4/3
=>x=-4/3

c)-x^2+5x-6=0
-2x+5x=6
3x=6
=>x=6:3
x=2

d)x^2-x-2=0
2x-x=2
x=2

e)2x^2+20x-48=0
4x+20x=48
24x=48
=>x=48/24
x=2

f)-6x^2+5x+1=0
36x+5x=1
41x=1
=>x=1/41

g)x^2-12x+9=0
2x-12x=-9
-10x=-9
x=9/10

h) x^2+(V3+1)•x+1V3=0
2x+V3+x=-1V3
3x=-1V3-1V3
3x=-2V3
x=-2V3/3

i)V2x^2-3x+V2=0
2x-3x=-V2
=>-x=-V2
=>x=V2