7pangkatx2+×-6= (1/149)pangkat×-2 =

7^(x² + x - 6) = (1/49)^(x - 2)
7^(x² + x - 6) = 7^-2(x - 2)
x² + x - 6 = -2x + 4
x² + 3x - 10 = 0
(x + 5)(x - 2) = 0
x = -5 atau x = 2