What can I say about the roots of a quadratic equation without actually calculating them?

If a quadratic equation is of the form ax2+bx+c, calculate D (Discriminant) whose value is b2-4ac. 

If the value of D is negative, the equation has imaginary roots.

If the value of D is positive, the equation has real and distinct roots.

If the value of D is zero, the equation has real and equal roots.

Answered by Swapnil S. Maths tutor

4134 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Factorise 6x^2 - 13x + 6


V= 4(h^3 +1)^0.5 - 4, find dv/dh when h=2


Given that y is directly proportional to square root of x and that y = 20 when x = 49 find an expression to represent x and y.


How do I know how many roots a quadratic equation has?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences