Answer:
2
Step-by-step explanation:
15.71
The answer is C.
m=y²-y¹/x²-x¹
m=(-12)-13/2-7
m=-25/-5
m=5
n - 1
(n-1)(n-5) / 2(n+3) ×2(n+3) / (n-5)
Kindly check attached picture for simplification