1000 (xpangkat2-3x-4)=10(xpangkat2-2x-3)

^ = pangkat

1000^(x^2 - 3x - 4) = 10^(x^2 - 2x - 3)
10^2(x^2 - 3x - 4) = 10^(x^2 - 2x - 3)
2(x^2 - 3x - 4) = x^2 - 2x - 3
2x^2 - 6x - 8 = x^2 - 2x - 3
2x^2 - 6x - 8 - x^2 + 2x + 3 = 0
x^2 - 4x - 5 = 0
(x - 5)(x + 1) = 0
x= 5 dan x = -1


Semoga membantu..
maaf kalo kurang jlas..