limit x mendekati -2 (x+3 - akar x2 -4x + 1) =

jawab

limit (x -> -2) √(x + 3)² - √(x² -4x + 1)

limit (x - >- 2) √(x² + 6x + 9 ) - √(x² - 4x + 1)
a= p
b =6
q= - 4

limit = (b - q) / 2√a
= (- 6 - (-4))/  2 √1
= -2/2
= - 1