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f(3) = 3p+q = -10
f(-2) = -2p+q = 0
-------------------- -
5p+0=-10
p=-2
subsitusi ke f(-2)
-2(-2)+q=0
4+q=0
q=-4
jadi f(x)=-2x-4
f(-7)=-2(-7)-4
=14-4
=10
f(-2)=> -2p+ q = 0 _
5p = -10
p = -10/5
p = -2
subtitusikan
-2p + q = 0
-2(-2)+q = 0
4 + q = 0
q = -4
nilai dari
f(-7) = px + q
= -2p + q
= -2(-7) -4
= 14 - 4
= 10
jawabya 10