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x + 2 -(x² + 5x + 6)
x + 2 -x² -5x -6
x -5x -x² + 2 -6
-4x -x² -4
= x+2 + x² + 5x + 6
= x² + x + 5x + 2 + 6
= x² + 6x +8
maaf y klo salah