tolong bantu penjelasannya kak

Kelas 11 Matematika
Bab Limit

lim (√x - x)/(√x + x)
x→0

= lim (√x - x)/(√x + x) . (√(x - x)/√(x - x))
...x→0

= lim (x - 2x√x + x²)/(x - x²)
...x→0

= lim (x (1 - 2√x + x))/(x(1 - x))
...x→0

= (1 - 2 √0 + 0)/(1 - 0)
= 1/1
= 1