Question

Rezolvati ecuatiile in multimea numerelor reale ecuatiile
:



rapid va roog

Answer 1

a)3x-x= -1
2x= -1
x = -1/2
b)4y-3y=1+5
y=6
c)-2y-3y=0,5-1
-5y= -0,5
y=1/2:5
y=1/2*1/5
y=1/10
f)2x-2=V2x-V2
2x-V2x= -V2+2
x(2-V2)= -V2+2
x=(-V2+2)*(-V2+2)
x=(-V2+2)^2
x=2-2V2+4
x=6-2V2
d)4x+3x-6=7x
7x-6=7x
7x-7x= 6
0=6 Fals
e)2x+1=2x-1+2
2x-2x=1-1
0=0 Adevarat 
g)15x-5/2=6x-1+3
15x-6x=2+5/2 amplificam pe 2 cu 2
9x=9/2 
x=9/2*1/9
x=1/2
h)1/4x+1/4=5/2  amplificam pe 5/2 cu 2
x+1=10
x=10-1
x=9