MYTUTOR SUBJECT ANSWERS

413 views

Expand and simplify (3x+2) (x-5)

We expand this term by term.

To make sure we expand every term, I use the beak method. To do this, draw 2 curves over the equation from the 3x to the x, and then a second curve from the x to the +2.

Then draw 2 more curves, this time under the equation, from the 3x to the -5, and the second from the -5 to the +2.

You will notice the lines make an outline of a beak.

Now we are ready to multiply all of the lines.

3x * x = 3x2

x * 2 = 2x

3x * -5  = -15x

5 * 2 = -10

Now we simply add all of these calculated terms together:

3x2+2x-15x-10

We can do one step of simplification as there are two x terms:

2x-15x=-13x

This now gives us the final answer:

3x2-13x-10

Dominic S. GCSE Maths tutor, 13 plus  Maths tutor, A Level Maths tuto...

9 months ago

Answered by Dominic, a GCSE Maths tutor with MyTutor


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

455 SUBJECT SPECIALISTS

£18 /hr

Christie M.

Degree: Medicine and surgery (Bachelors) - Newcastle University

Subjects offered: Maths, English Literature+ 4 more

Maths
English Literature
Chemistry
Biology
.UKCAT.
-Personal Statements-

“Hi, I'm Christie, currently studying 'Medicine and Surgery' at Newcastle University! I aim to share my recent experience of gaining a place at medical school plus to assist individuals who find biology or chemistry a challenge.”

£18 /hr

Vinay S.

Degree: Aerospace Engineering (Masters) - Bath University

Subjects offered: Maths, Science+ 4 more

Maths
Science
Physics
Further Mathematics
Economics
-Personal Statements-

“About Me: Hey! I'm a Aerospace Engineering student at the University of Bath. Although my course suggests I'm simply a Maths and Physics kind of guy, I also have a huge passion for Economics, so please feel free to pick my brain on any...”

MyTutor guarantee

£18 /hr

Oliver V.

Degree: Mathematics (Masters) - Oxford, St John's College University

Subjects offered: Maths, Chemistry+ 4 more

Maths
Chemistry
Biology
.MAT.
-Personal Statements-
-Oxbridge Preparation-

“University of Oxford Mathematics student enthusiastic about improving grades and preparing for entrance exams”

MyTutor guarantee

About the author

£18 /hr

Dominic S.

Degree: Maths with French (Bachelors) - Southampton University

Subjects offered: Maths, Further Mathematics

Maths
Further Mathematics

“Hello! I'm a Maths with French student at Southampton University. I love being able to help people fully grasp challenging mathematics. Maths can be a difficult thing to get your head around, but with a personal tutor you can learn mu...”

MyTutor guarantee

You may also like...

Other GCSE Maths questions

Rearrange y = (3x+5)/x to make x the subject

How do I solve fractions with unknowns in the denominators?

What is the Pythagoras Equation?

How many people chose A?

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