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.

SS
Answered by Swapnil S. Maths tutor

4326 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Evaluate 25^(3/2) giving your answer as an integer or simplified fraction (2 marks).


For which values of x is x^2 - 5x + 6 < 0 true?


Find the coordinates where the curve f(X)= X^2+X-6 touches the x axis using factorisation.


3kg of meat costs £54, Nina buys 2 kg of the meat. Work out how much Nina pays. (non-calculator)


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences