Question

Jika P(x) = 2x^3 + 4x^2 + 7x -5 dibagi dengan 2x - 1, sisanya adalah

Answer 1

2x-1 = 0
2x = 1
x = 1/2

P(1/2) = 2.(1/2)^3 + 4.(1/2)^2 + 7.(1/2) - 5
P(1/2) = 2.1/8 + 4.1/4 + 7/2 - 5
P(1/2) = 1/4 + 1 + 7/2 - 5
P(1/2) = 1/4 + 4/4 + 14/4 - 20/4
P(1/2) = 19/4 - 20/4
P(1/2) = -1/4