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f(x) = (x - 1).H(x) + 5
Maka :
f(x) = (x^2 + x - 2). H(x) + ax + b
f(x) = (x + 2)(x - 1). H(x) + ax + b
f(- 2) = - 2a + b = - 4
f(1) = a + b = 5
------------------------------- minus
- 3a = - 9
a = 3
Maka
a + b = 5
3 + b = 5
b = 2
Maka sisanya adalah
ax + b
3x + 2