Question

URGENT!!!
lg( x + 3/2) = -lgx

Answer 1

lg(x+3/2)=lg$x^{-1}$ => x+3/2 = 1/x | *x
$x^{2}$+1,5x - 1 = 0
delta=2,25+4=6,25
x= (-1,5 + 2,5)/2=0,5
sau 
x=(-1,5-2,5)/2=-2