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B= -2
C= -4
1) -2A - 3B + C
-2(3) -3(-2) +(-4)
-6 +6 -4= -4
2) -BC -AB +AC
-(-2)(-4) -(3)(-2) +(3)(-4)
-8 +6 -12= -14
3) -A elevado 2 -2B +C
(-3)^2 -2(-2) +(-4)
9 -4 -5= 0
4) -3(-2) +(-4) -2(3)
6-4-6= -4
5) -5(-2) +4(-4) / 2(3)
10 - 16 / 6
10 - 8 / 3
mcm: 3
(30 - 8) / 3
12 / 3 = 4