Punchlinegirl Messages 221 Reaction score 0 Thread starter Oct 15, 2006 #1 I'm feeling really stupid right now, but I can't seem to get this to factor. 2r^2 +2r+1= 0 Can someone please help me out?
I'm feeling really stupid right now, but I can't seem to get this to factor. 2r^2 +2r+1= 0 Can someone please help me out?
Hurkyl Staff Emeritus Science Advisor Gold Member Messages 14,922 Reaction score 28 Oct 15, 2006 #2 You could factor it if you knew its roots, right?
Punchlinegirl Messages 221 Reaction score 0 Oct 15, 2006 #3 so to find the roots I'd use the quadratic formula -2 +/- [tex]\sqrt 4-8[/tex] /4 so then would my roots be -.5 +/- 2i?
so to find the roots I'd use the quadratic formula -2 +/- [tex]\sqrt 4-8[/tex] /4 so then would my roots be -.5 +/- 2i?
Hurkyl Staff Emeritus Science Advisor Gold Member Messages 14,922 Reaction score 28 Oct 15, 2006 #4 I think you divided wrong. But you have the right idea. (And you should use parentheses when appropriate)
I think you divided wrong. But you have the right idea. (And you should use parentheses when appropriate)