cara menentukan nilai a nya gimana ya ? mohon bantuannya

Lim x² + 5x - 6 = 8
x→a

Lim x² + 5x - 6 - 8 = 0
x→a

Lim x² + 5x - 14 = 0
x→a

Lim (x + 7)(x - 2) = 0
x→a

→
x + 7 = 0
a + 7 = 0
a = -7

atau :

→
x - 2 = 0
a - 2 = 0
a = 2