Akar 5^3x+5 = 125 tolong pakai cara ya?.... Question from @novita261

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October 2018 2 14 Report

Akar 5^3x+5 = 125
tolong pakai cara ya?

whongaliem $\sqrt{ 5^{3x + 5} }$ = 125
$( 5^{3x + 5}) ^{ \frac{1}{2} }$ = 5³
$5^{ \frac{3x + 5}{2} }$ = 5³
$\frac{3x + 5}{2}$ = 3
3x + 5 = 6
3x = 6 - 5
3x = 1
x = $\frac{1}{3}$

0 votes Thanks 2

dnnyz07 $$\begin{align} \sqrt{5^{3x+5}} &= 125 \\ 5^{3x+5} &= 125^2 \\ 5^{3x+5} &= (5^3)^2 \\ 5^{3x+5} &= 5^6\end{align}$
$$\begin{align} 3x + 5 &= 6 \\ 3x &= 6-5 \\ 3x &= 1 \\ x&= \frac{1}{3}\end{align}$

0 votes Thanks 2