I am sorry I posted the wrong question. Still early in the morninga²-2a-4≥0

This is exactly the same question that I just did only here you used a and in the last one you used x.

They are the same.

http://web2.0calc.com/questions/i-have-attempted-to-solve-this-problem-numerous-of-times-can-someone-please-help-me-it-is-asking-me-to-solve-the-equality