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px + q px + q
p.-3 + q = -21 p.4 + q = 7
-3p + q = -21......(1) 4p + q = 7.............(2)
Eliminasi:
-3p + q = -21
4p + q = 7 _
-7p = -28
p = -28 : -7
p = 4
Subtitusi :
4p + q = 7
4.4 + q = 7
16 + q = 7
q = 7 - 16
q = -9
p = 4 , q = -9
p + q =
4 + (-9) = -5
g(-3)= p . (-3) + q = -21
g(4) = p . (4) + q = 7
- 3p + q = - 21
4p + q = 7 -
-7P = - 28
p= -28
7
p = - 4
q = - 4 = 4p + q = 7
4 . (- 4) + q = 7
- 16 + q = 7
q = 7 + 16
q = 23
jadi nilai p = - 4 dan q = 23