Recent content by Hyzon

Thanks, yeah so I get that now. But I'm stumped again on the same topic. For what values of k does each equation have two different real roots? a) x2+kx+1=0 I used the discriminant k^2-4(1)(1) k^2-4 k-2 k>2, k<(-2) or |k|>2 I understand that one, but question b) has k in the a position...

Homework Statement State the condition for the equation px^2 + qx + r = 0 to have: a)two different real roots b)two equal real roots c)no real rootsHomework Equations b^2-4ac maybe?The Attempt at a Solution I missed a class due to ailments and now have to catch up on missed work. I can't find...

Ah, yeah I knew I was looking at it wrong. Thanks a lot for the help!

1. An Acapulco diver dives into the sea from a height of 35 m. His height h metres t seconds after leaving the cliff is given by h=-4.9t^2+t+35. How long is it until he reaches the water? How long does it take him to fall from 35 m to 25 m? 2. (-b +/-(sqrt)b^2-4ac)/2b 3. I don't have any work...