Nature of Roots for a Quadratic Equation (Discriminant) : ExamSolutions Maths Revision 

Thanks! Watching this video from South Africa before I write my final year preliminary examinations

thanks, man I forgot everything and it came all back

Clear explanation, thanks!

It all makes sense now!

Subscribed.. Best explanation of this I could find. Only have one question: Why's it called the discriminant and why do people use delta for it?

thank you so much you explained it much better than the other videos

Please help me with the following questions 1.a) Given that x^2+5x+b=0 has the roots k and -2k, where k is a constant. Find the values of b and k.[3] b) In the equation 1/8x^2 +(k+3)x +4k^2 +36=0, find the values of k if the roots are: (i) Non-real. [3] (ii)Real. [3] 2.a) Solve the equation b^4=6b^2 - 9 [2] b) Find all the roots of the equation y^-6 - 9y^-3 + 8=0. [2]

omg i pass my test thank you very much for doing this video

so glad u exist thank the Lord

Tnx For the Tip ^_^ LOVE THIS VID VERY INFORMATIVE

very very very very late question but is it right that when the value of the discriminant is negative, instead of no solution it would be 2 diff imaginary numbers?

Thanks so much :D

Do perfect square trinomials always have roots? I am\ currently doing a question where i have to proof mx(x)-2nx+6n-9m=0 has real roots for all values of m and n. And state the condition where they will have 2 real and equal roots. and i managed to proof that the equation is a perfect square trinomial

Great

Didn't got the thing for which I was searching and came here

Who else is watching from 2020?