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2013-09-24T11:38:13-03:00
13x²-11x-15 +( -7x²-2x+16) = 6x² -13x +1
A=6 / B= -13/ C=1
A+B+C= -5
13 3 13
2013-09-24T11:43:54-03:00
(13x²-11x-15)+(-7x²-2x+16)=
13x²-11x-15-7x²-2x+16=
13x²-7x²-11x-2x-15+16=
6x²-13x+1
a=6  b=-13  c= 1
a+b+c= 6-13+1= -7+1= -6
23 4 23