ANSWERS: 1
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I wrote an explanation to go along with this, but it was accidentally deleted. Since this question is a month old, I guess it no longer matters. (3(x^2)-12)/(6x+12) = 3[(x^2)-4]/[3(2x+4)] = [(x^2)-4]/(2x+4) = [(x+2)(x-2)]/[2(x+2)] = (x-2)/2
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