mohon bantuannya yah !! pake cara teorema limit yah

Kelas 11 Matematika
Bab Limit

1] lim (x² - 49)/(x + 7)
    x→ -7

= lim ((x + 7) (x - 7)) / (x + 7)
   x→ -7

= -7 - 7
= -14

2] lim (x² + 5x - 36)/(x²  - 3x - 4)
    x→ 4

= lim ((x + 9) (x - 4)) / ((x - 4) (x + 1))
   x→ 4

= (4 + 9) / (4 + 1)
= 13/5
= 2 3/5

3] lim (4x² + 4x - 3) / (4x² - 16x + 7)
   x→ 1/2

= lim ((2x + 3) (2x - 1)) / ((2x - 1) (2x - 7))
   x→ 1/2

= (2 . 1/2 + 3) / (2 . 1/2 - 7)
= (1 + 3) / (1 - 7)
= 4/-6
= -2/3