tolong sama pembahasan ya

Lim x² - 4 / x + 2
x→-2

Lim (x + 2)(x - 2) / (x + 2)
x→-2

Lim (x - 2)
x→-2

= -2 - 2

= -4

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Lim ax² + b = -4
x→1

a (1)² + b = -4
a + b = -4

~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Lim ax² + b = 2
x→2

a (2)² + b = 2
4a + b = 2

~~~~~~~~~~~~~~~~~~~~~~~~~~~~

4a + b = 2
a + b = -4
----------------- (-)
3a = 2 - (-4)
3a = 6
a = 6/3
a = 2

a + b = -4
b = -4 - 2
b = -6

→ maka a - b :
= 2 - (-6)
= 2 + 6
= 8