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= 6X + 7 - 3X - 6
= 6X -3X + 7 - 6
= 3X + 1
B. 3 ( 2X² - 4X + 6) + 2 (4X² + 3X - 8)
= 6X² - 12X + 18 + 8X² + 6X - 16
= 6X² + 8X² - 12X + 6X + 18 - 16
= 14X² - 6X + 2
B. (6x pangkat 2 - 12x + 18 ) + (8x pangkat 2 + 6x - 16 ) = 14x pangkat 2-6x+2