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= 6x² + 13x + 6
2. x² + 2x - 4x - 8
= x² - 2x - 8
= 2x(3x +2) +3(3x +2)
= 6x² +4x +9x +6
= 6x² +13x +6
2. (x +4) (x +2)
= x(x +2) -4(x +2)
= x² +2x -4x -8
= x² -2x -8
Itu jawabannya.