Question

Realiza
2(logx)²+7logx- 9=0

Answer 1

2(logx)² + 7logx - 9 = 0
2.2(logx) + 7(logx) = 9
11(logx) = 9
  logx = 9/11
       $x = 10^{ \frac{9}{11} }$

Answer 2

2(logx)²+7logx- 9=0
(2log x+9)(log x-1)=0
2log x+9=0   ∨   log x-1=0
log x= -9/2             log x=1
 10⁻⁹/²=x                 logx=log10
                                   x=10