MYTUTOR SUBJECT ANSWERS

338 views

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

Let ax2 + bx + c = 0 be the equation in question where a,b,c are real numbers with a not equal to 0 (otherwise we would not have a quadratic).

 

If:

b2 - 4ac > 0 then there are two (real) roots

b2 - 4ac = 0 then there is exactly one (real) root

b2 - 4ac < 0 then there are no (real) roots.

Amit G. GCSE Maths tutor, A Level Maths tutor, 13 plus  Maths tutor

2 years ago

Answered by Amit, a GCSE Maths tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

331 SUBJECT SPECIALISTS

£18 /hr

Ross N.

Degree: Medicine (Bachelors) - Exeter University

Subjects offered: Maths, Chemistry+ 2 more

Maths
Chemistry
Biology
.UKCAT.

“About Me: I'm Ross and I'm a Medical Student at the University of Exeter. I strongly believe that science + maths are incredibly interesting and fun subjects when you understand them - I intend to help you do just that. I am a high e...”

£18 /hr

Tiarnan B.

Degree: MChem (Masters) - York University

Subjects offered: Maths, Geography+ 2 more

Maths
Geography
Chemistry
-Personal Statements-

“About Me: I am a student of Chemistry at the University of York studying for a masters degree and am a self-confessed science nerd! My goal is to give you the help you need, build your confidence and push you to be the best you can. A...”

£18 /hr

Peter H.

Degree: Mathematics (Bachelors) - Durham University

Subjects offered: Maths, Physics+ 2 more

Maths
Physics
Further Mathematics
.STEP.

“About me: I am a Mathematics student at Durham University, and I am currently in my 3rd year. I would very much like to give assistance and help students of all abilities to reach the goals they aspire to in Maths and Physics, whether...”

MyTutor guarantee

About the author

Amit G.

Currently unavailable: for regular students

Degree: Mathematics (Bachelors) - Warwick University

Subjects offered: Maths

Maths

“Mathematics Undergraduate at the University of Warwick. I enjoy to help broaden knowledge and develop maths skills.”

MyTutor guarantee

You may also like...

Other GCSE Maths questions

How do I simplify fully (p^3 x p^4)/p^2?

How would I solve x^2 + 7x + 10 = 0

Using the quadratic equation, solve 3x^2+2x-15 to two decimal places.

Expand and simplify the following equation 5a(4b - 3) - 2a(6 + b)

View GCSE Maths tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok