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= 2x × (-3x) + 2x × 4 - 1 × (-3x) - 1 × 4
= 5x^2 + 8x + 3x - 4
= 5x^2 + 11x - 4
Semoga bermanfaat ya. Maaf kalau salah
=6x^2 + 8x - 3x - 4
=6x^2 + 5x - 4