<PRE><B>Question 819008</B>
3 and 6.


-3 and 6 multplies to -18, adds to +3.
3 and -6 multiplies to -18, adds to -3.
Not work.


What about 2 and 9?


-2 and 9 multiplies to -18, adds to 7.
2 and -9 multiplies to -18, adds to -7.


A^2-9A-18 is not factorable.


You would generally want INTEGERS x and y so that xy=-18 and x+y=-9.
y=-x-9;
x(-x-9)=-18
-1*x(x+9)=-18
x(x+9)=18
x^2+9x=18
x^2+9x-18=0
Resorting to general solution of quadratic formula:
x=(-9+- sqrt(81-4(-18))/(2)
x=(-9+- sqrt(81+72))/2
x=(-9+- sqrt(153))/2
x=(-9+- 3*sqrt(17))/2
..... You really do not want this.</PRE>