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2 x2 +5x +2 = 2 x2 + 4x +x +2 = 2x (x+2) + 1 (x+2)
2 x2 - 8 = 2 (x2 - 4) = 2 [(x-2)(x+2)]
x2 - x -2 = x2 - 2x +x -2= x(x-2)+1 (x-2)
penyelesaian
2 (x-2)(x+2) * 2x+1 (kalisilang)
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(2x+1)(x+2) (x-2)(x+1)
(dicoret-coret)
= 2/x+1