f(x) = px+q, jika f(2) = -5, dan f(-2) = 11 maka nilai dari f(-5) adalah.....

f(x)= px+q
f(2)= 2p+q= -5
f(-2)= -2p+q= 11
Eliminasi
(2p+q)-(-2p+q)= -5-11
4p= -16
p= -4

(2p+q)+(-2p+q)= -5+11
2q= 6
q= 3

f(x)= -4x+3
f(-5)= -4(-5)+3= 23