5log2x^2-5log(x+5)=1

5 log 2x² - 5 log (x + 5) = 1
5 log (2x²/(x + 5)) = 5 log 5

Maka
2x² / (x + 5) = 5
2x² = 5 (x + 5)
2x² = 5x + 25
2x² - 5x - 25 = 0
(2x + 5) (x - 5) = 0

• 2x + 5 = 0
2x = -5
x = -5/2
• x - 5 = 0
x = 5

Jadi, x = -5/2 dan x = 5