4) = 12x² - 4x - 36 + 12x
= -4x² +24x - 36 (a)
5) (2x + 7)² = (2x + 7)(2x + 7)
= 4x² + 14x + 14x + 49
= 4x² + 28x + 49 (d)
6) 3(-1)²(2) - (2)(-2) = 6 - (-4) = 6 + 4 = 10 (d)
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4) = 12x² - 4x - 36 + 12x
= -4x² +24x - 36 (a)
5) (2x + 7)² = (2x + 7)(2x + 7)
= 4x² + 14x + 14x + 49
= 4x² + 28x + 49 (d)
6) 3(-1)²(2) - (2)(-2) = 6 - (-4) = 6 + 4 = 10 (d)