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= 5x² - x + 2
2). -4(2x + 6 ) dari -5(x - 2)
= -8x - 20 dari -5x + 10
= -3x - 10
= 12x kuadrat -9x+6-7x kuadrat +8x-14
= 12x kuadrat - 7x kuadrat -9x+8x+6-14
= 5x kuadrat -x-8
2. (-5(x-2))-(-4(2x+6))
= (-5x+10)-(-8x-24)
= -5x+10+8x+24
= -5x+8x+10+24
= 3x+34
maaf kalau salah
semoga membantu ;)