ath

Quote:

2x^2+5x-3=0

this factors on inspection to (2x - 1)(x + 3) so the roots are given by

2x-1 = 0 ==> x = 1/2

x+3 = 0 ===> x = -3

This clip is very good (all except the man waving his pen around the place )

I think that you should watch it

http://www.youtube.com/watch?v=ZQ-NRsWhOGI