MYTUTOR SUBJECT ANSWERS

392 views

How do I expand and simplify linear equations?

Let's take the example: 3(x + 2) + 2(x - 1)

Start with the first part: 3(x + 2)

We have to multiply what is outside of the bracket with the individual things inside the bracket sparately and add them together:

3 x (x) + 3 x (2)

Now SIMPLIFY to get: 3x + 6

 

Next part, we just do the same method:

2(x - 1) =

2 x (x) + 2 x (-1) =

2x - 2

^^^ This is always a good way to lay out your work!

Now add the two parts together:

(3x + 6) + (2x -2)

Putting the bits with 'x's in them next to each other helps:

(3x + 6) + (2x -2) =

3x + 2x + 6 - 2 =

5x + 4

We can't go any simpler than this!

 

Alexis O. GCSE Maths tutor, A Level Maths tutor

2 years ago

Answered by Alexis, who has applied to tutor GCSE Maths with MyTutor

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

333 SUBJECT SPECIALISTS

£20 /hr

Costas Y.

Degree: Electrical & Electronic Engineering (Doctorate) - Imperial College London University

Subjects offered: Maths, Further Mathematics + 1 more

Maths
Further Mathematics
Electronics

“About Me: I am a 3rd year PhD student at Imperial College London studying in the Electrical and Electronic Engineering department. Ambitious and enthusiastic engineer and have a passion for mathematics and electronics. Aside from my...”

MyTutor guarantee

£18 /hr

Harry B.

Degree: Music (Bachelors) - Cambridge University

Subjects offered: Maths, Russian+ 5 more

Maths
Russian
Music
Latin
History
English Literature
English Language

“Hi there, my name is Harry and I'm a finalist reading music at the University of Cambridge. I absolutely love all types of muisc and fortuantely, in my degree, I'm studying a really wide variety of subjects, ranging from the 13th Cent...”

MyTutor guarantee

£18 /hr

Jenny M.

Degree: Biological and Medical Sciences (Bachelors) - Liverpool University

Subjects offered: Maths, Science+ 3 more

Maths
Science
French
Chemistry
Biology

“First year studying Biomedical Sciences at Liverpool University, looking to tutor in Biology, Chemistry, Maths and French.”

About the author

£18 /hr

Alexis O.

Degree: Film and English (Bachelors) - Bristol University

Subjects offered: Maths

Maths

“Further Maths and Maths A-levels at top comprehensive Camden School for Girls. I love Maths and would love to help improve your grades/enourage your own enjoyment of the subject!”

MyTutor guarantee

You may also like...

Posts by Alexis

How do I expand and simplify linear equations?

How do I find the cartesian equation for a curve written in parametric form?

Other GCSE Maths questions

There are 7 white socks and 4 black socks in a drawer. Two socks are taken out at random without replacement. Work out the probability that the two socks are the same colour

How do you find the length of a side of a right angled triangle when given the other two side lengths?

What is the cosine rule?

N = 2A + B. A is a two-digit square number. B is a two-digit cube number. What is the smallest possible value of N?

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