mohon bantuannya dan jawaban dengan caranya juga secara ringkas

8.
³log (4x-1) = 3
³log (4x-1) =³log 3³
³log (4x-1) = ³log 27
4x - 1 = 27
4x = 27 + 1
4x = 28
x = 7

9.
x² + 7x + 1 = 2x² + 7x
2x² - x² + 7x - 7x - 1 = 0
x² - 1 = 0
x² = 1
x = 1 atau x = -1

10.
x² - 6x = 12 - 2x
x² -6x + 2x - 12 = 0
x² - 4x - 12 = 0
(x - 6)(x + 2) = 0
x = 6 atau x = -2