You can
put this solution on YOUR website! x^2+14x+c
1. The coefficient of x is 14.
2. Multiply that coeficient 14, by
. Get 7
3. Square 7. Get 49
That's it.
x^2+14x+c then becomes x^2+14x+49 which factors as (x+7)(x+7)
which can then be written as (x+7)^2, which is the square of a
binomial.
Edwin