-6
to work it out: remember BIDMAS
so 3x2=6! then 6-12=-6
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-3x2 + 16x + 12 = -3x2 + 18x - 2x + 12 = -3x*(x - 6) - 2(x - 6) = -(3x + 2)*(x - 6)
The equation is equivalent to: -3x2 - 12x - 1 = 0 [you could change signs to get 3x2 + 12x + 1 = 0 but that is not required] The discriminant is (-12)2 - 4*(-3)(-1) = 144 - 12 = 132
-3x2+10x-3 -(3x2-10x+3) -(3x-1)(x-3)
3x2 if it is in parentheses
96= 48x2 48= 24x2 24= 12x2 12= 6x2 6= 3x2 Thus 96= 2x2x2x2x3