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x^2 + 2x = 3x + 6
x^2 + 2x - 3x = 6
x^2 - x - 6 =0
2. 2 (x² + 1) = x (x + 3)
2x^2 + 2 = x^2 + 3x
2x^2 + 2 - x^2 = 3x
x^2 + 2 - 3 x = 0
x² + 2x - 3x - 6 = 0
x² - x - 6 = 0
(x - 3) (x + 2) = 0
x = -2 V 3
maka HP-nya = {-2,3}
2. 2x² + 2 = x² + 3x
2x² + 2 - x² - 3x = 0
x² - 3x + 2 = 0
(x - 2) (x - 1) = 0
x = 1 V 2
maka HP-nya = {1,2}