Tolong dijawab plisss

Dik:f(x): 5x-7
Ditanya:
a. f(-2)-f(10) = (5(-2)-7)-(10(10)-7)
= (-10-7)-(100-7) = -17-93 = 110
b. f(0)-f(2) = (5(0)-7)-(5(2)-7)
= (0-7)-(10-7)= -7-3 =-10