Question 288538
What numbers multiply to get 28 and add or subtract to get 12?  Multiples of 28 are 1,2,4,7,14,28.  2x14=28.  14-2=12


x²-12x -28 =
Since the 28 is negative you know you have to use opposite signs.  Since the 12 is negative, you know the larger number must be negative:

(x-14)(x+2)=
x=14, x=-2