<PRE><B>Question 1193600</B>
By FACTORING,

x^2+15x=-50

x(x+15)=-50

Factorizations for 50:
{{{2*25=5*10}}}
But for two numbers to give -50, and they differ each other by 15, look at either
-5 and 10
or
5 and -10.


If x=-5, then x+15=-5+15=10.
You could check to see if the other combination does or does not also work.</PRE>