No 9 dan 10 kak minta bantuanya

y = (3x-2)/(5x+8)
y(5x+8) = 3x-2
5xy + 8y = 3x - 2
5xy - 3x = -(8y + 2)
x(5y-3) = -(8y+2)
x = -(8y+2)/(5y-3)

f'(x) = -(8x+2)/(5x-3)
Gda jawabannya

10.
y = (2x+3)/(4-5x)
y(4-5x) = (2x+3)
4y-5xy = 2x + 3
-(5xy+2x) = -4y+3
-x(5y+2) = -4y + 3
x = -(4y-3)/-(5y+2)
x = (4y-3)/(5y+2)

f'(x) = (4x-3)/(5x+2)
f'(x-2) = (4x-11)/(5x-8)
D