coba kerjain no 4. soalnya butuh bantuan

a) (3 - √x²) / (x + 3)
= (3 - x) / (x + 3)
turunan
= -1 / 1
= -1

b) langsung turunkan
= (2x - 4) / (1)
masukan x = -2
= (2(-2) - 4)
= -4 - 4
= -8