# How do I use the vertex formula to determine the vertex of the graph for # x^2 + 6x + 8y + 25 = 0#?

##### 1 Answer

Jun 14, 2015

This has always been kinda confusing for me since no one explained to me so I learned on my own. I found this graphing calculator online which shows the vertex,explanations & everything! I will put the link below....

http://www.mathportal.org/calculators/quadratic-equation/quadratic-function-grapher.php

Again, I'm sorry I couldn't explain it to you...