How many real number solutions does the equation 7x^2-5x+1=0 have?
please explain steps to solve

Question

How many real number solutions does the equation 7x^2-5x+1=0 have?
please explain steps to solve

anonymous · Answer

No real solution because Discriminant i.e. d= b^2 - 4ac <0 in this case
Because     here b= -5
                        a= 7 and c=1
thus putting values,    d= (-5)^2 - 4 (7)(1)
                                  = 25 - 28
                                   = -3                       < 0

anonymous · Answer

oh ok, can u help me with another prob?

anonymous · Answer

O.k. is this clear??? then post it....

anonymous · Answer

yeah I understand it now,
A volleyball player spikes the ball from the height of 9 feet with a downward velocity of 80 feet per second. To the nearest hundredth of a second, how long does the other team have to prevent the ball from hitting the ground?

anonymous · Answer

this one confuses me

anonymous · Answer

It means you simply need to calculate the time after which it will strike the ground... use 2nd law of motion...

anonymous · Answer

is the formula that someone before gave me correct?

anonymous · Answer

I don't know what formula anyone gave you.... If you post here , I can check it now...

anonymous · Answer

attachment

anonymous · Answer

http://openstudy.com/users/evy15#/updates/50a90a80e4b082f0b8534596

anonymous · Answer

Ya, its correct only...