logx(x^2+4)=log x(5x)
X^2 + 4 = 5X ( Log (X) = Log (X)) X^2 - 5X + 4 = 0 D = 25 - 16 = 9 V D = 3 X1 = ( 5 + 3 ) : 2 = 4 X2 = 2 : 2 = 1 -----------------