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1-a+b -2 = 0
-a + b = 1
b = a+1 ...(1)
.
f(-2) = -36
-8 - 4a -2b -2 = -36
-4a - 2b = - 26
atau
2a+ b = 13....(2)
.
(1) substitusikan ke (2)
2a + a + 1 = 13
3a = 12
a= 4
b = a+1--> b = 5
.
a+b = 4 + 5 = 9