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[tex]\text{ x}^2\text{ + 15x + C}[/tex]
1.- i'll divide 15 by 2
15/2
2.- Then, I square the result
(15/2)^2 = 225/4
3.- Trinomial
[tex]\begin{gathered} \text{ x}^2\text{ + 15x + }\frac{225}{4} \\ or \\ x^2\text{ + 15x + (}\frac{15}{2})^2 \end{gathered}[/tex]4.- Conclusion
C = 15/2 or C = 225/4
