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= x(x - 1) H(x) + 5x + 1
f(1) = 5.1 + 1 = 6
f(x) = (x² + x)H(x) + 3x + 1
= x(x + 1)H(x) + 3x + 1
f(-1) = 3.(-1) + 1 = - 2
f(x) = (x² - 1)H(x) + ax + b
= (x - 1)(x + 1)H(x) + ax + b
f(1) = a + b = 6
f(-1) = -a + b = -2 -
2a = 8
a = 4
b = 2
Jadi sisa pembagiannnya adalah (4x + 2)