MYTUTOR SUBJECT ANSWERS

385 views

Factorising a Quadratic

Factorising a quadratic polynomial of the form,

ax2 + bx + c = 0

can be done in many depends depending on the values we have for a, b and c. 

Some simple polynomial could be done simply by recognition. For example:

 x2 + 4x + 3 = 0

In this scenario we would use the assumption that the factorisation is of the form:

(dx+e)(fx+g) = 0

and we would consider the values of d, e, f and g.

As the coefficient of the xterm is 1, d and f would both be 1. Hence:

(x+e)(x+g) = 0

Now we need numbers for e and g such that:

e*g = 3 and,

e+g = 4

We find that e = 3 and g = 1 or visa versa. 

Hence we can factorise 

x2 + 4x + 3 = 0 

to (x+3)(x+1) = 0

Hanumanth Srikar K. IB Further Mathematics  tutor, IB Maths tutor, GC...

1 year ago

Answered by Hanumanth Srikar, a GCSE Maths tutor with MyTutor


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

511 SUBJECT SPECIALISTS

£18 /hr

Elizabeth P.

Degree: Geophysics (Bachelors) - Durham University

Subjects offered:Maths, -Personal Statements-

Maths
-Personal Statements-

“Hey there! My name is Libby and I’m currently in my final year studying Geophysics at Durham university. I love to get other people as excited about maths and science as I am and have done so by tutoring at school, being involved outr...”

MyTutor guarantee

£18 /hr

Aylin L.

Degree: Physics with Astrophysics (Bachelors) - Manchester University

Subjects offered:Maths, Physics+ 1 more

Maths
Physics
Biology

“Tutor studying in one of the best Physics departments in Europe. Here to help spread enthusiasm about Science and good marks in exams.”

MyTutor guarantee

£18 /hr

Rohin A.

Degree: Pre-clinical medicine (Bachelors) - Oxford, Wadham College University

Subjects offered:Maths, Biology+ 4 more

Maths
Biology
.UKCAT.
-Personal Statements-
-Oxbridge Preparation-
-Medical School Preparation-

“About MeHi, I`m a second year medical student at the University of Oxford.Our course is science-orientated meaning I have an expert understanding of the basic sciences and, since I`ve been through the school system recently, I unde...”

About the author

Hanumanth Srikar K.

Currently unavailable: for new students

Degree: Maths and Economics (Bachelors) - LSE University

Subjects offered:Maths, German+ 3 more

Maths
German
Further Mathematics
Economics
Chemistry

“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

You may also like...

Posts by Hanumanth Srikar

Differentiation from first principles

Factorising a Quadratic

Other GCSE Maths questions

If (2/3)^n=〖(3/2)〗^2 what is the value of n

How do you work out the area of a triangle?

Expand and simplify (x+4)(x-5).

What is Pythagorus' Theorem?

View GCSE Maths tutors

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

mtw:mercury1:status:ok