fungsi h dinyatakan drngan rumus h(x)= px+q. jika h(4)= -28 dan h (-5) = 26, nilai h (-12) adalah..

di ketahui h(x) = px + q, dan h(4) = -28 , h(-5) = 26 maka

h(4) = p(4) + q = -28
= 4p + q = -28 ... (1)

h(-5) = p(-5) + q = 26
= -5p + q = 26 ...(2)

4p + q = -28 ...(1)
-5p + q = 26 ...(2)
__________ -
9p = 54
9 . p = 54
p = 6


4p + b = -28
4(6) + b = -28
24 + b = -28
b = -52

jadi h(x) = 6x + -52

h(-12) = 6 (-12) + -52
= -72 + -52
= -124