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x² + x + 22 = 5,6 x 5
x² + x + 22 = 28
x² + x + 22 - 28 = 0
x² + x - 6 = 0
(x - 2)(x + 3) = 0
x - 2 = 0
x1 = 2
x + 3 = 0
x2 = -3 ⇒ tidak memenuhi
(x + 3 + x² + 9 + 10) = 5 x 5,6
x² + x + 22 = 28
x² + x - 6
( x - 2 ) ( x + 3)
X = 2 dan atau x = -3