7
Yes.
6/7 + 1/6 = 36/42 + 7/42 = 43/42 = 11/42
-x2 + x + 42 = -[x2 - x - 42] = -[x2 - 7x + 6x - 42] = -[x*(x - 7) + 6*(x - 7)] = -(x - 7)*(x + 6)
(5+7-42)(24-2+3) = (12-42)(22+3) = (-30)(25) = -750
3/7 + 1/6 = 18/42 + 7/42 = 25/42
23/42 + 1/6 = 23/42 + 7/42 = 30/42 = 5/7
GCF(7, 42) = 77 = 7*1 and 42 = 7*6 So 7 + 42 = 7*(1 + 6).
-x2 + x + 42= -x2 + 7x - 6x + 42= 7x - x2 + 42 - 6x= x(7 - x) + 6(7 - x)= (7 - x)(x + 6)
42
The answer is 7
= -(x - 7)(x + 6)