MYTUTOR SUBJECT ANSWERS

273 views

Factorise x² + 2x - 8

Since an x² is produced, we know that the factorised version will be (x+a)(x+b). To find a and b we need to consider the relationship between 2 and -8. It is going to be factorised into two brackets, due to the x², so we need to break the 2 down into 2 numbers that will add to give 2 and multiply together to give -8. The 8 is negative so one of these numbers must also be negative. These 2 numbers must be 4 and -2. Then substitude these numbers in to be a and b so the equation factorised is (x+4)(x-2)

Hannah B. 13 Plus  Maths tutor, GCSE Maths tutor, A Level Maths tutor...

5 months ago

Answered by Hannah, a GCSE Maths tutor with MyTutor


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

510 SUBJECT SPECIALISTS

£30 /hr

Edward H.

Degree: Geography (Masters) - Oxford, Balliol College University

Subjects offered:Maths, Music+ 7 more

Maths
Music
Mandarin
Geography
French
English
Chemistry
.TSA. Oxford.
-Personal Statements-

“I am a Geography student at Oxford University, but I also have experience tutoring in Maths, Chemistry, English, French, Mandarin Chinese, and Music. I am an ethusiastic and dedicated individual, tailoring my classes to the needs of ea...”

£18 /hr

Emily R.

Degree: Biomedical Science (Bachelors) - Queen's, Belfast University

Subjects offered:Maths, Chemistry+ 1 more

Maths
Chemistry
Biology

“First year Biomedical Science student at Queens University Belfast. Achieved first place in both Biology and Chemistry in my school year at Alevel.”

MyTutor guarantee

£18 /hr

Samuel L.

Degree: Economics and Mathematics (Bachelors) - Durham University

Subjects offered:Maths, Economics

Maths
Economics

“Hi, I’m studying Maths and Economics at Durham University. Whilst at school I regularly tutored younger students in both subjects and spent a year coaching a football team. I believe this gave me many good qualities for teaching such a...”

MyTutor guarantee

About the author

£18 /hr

Hannah B.

Degree: History (Bachelors) - Durham University

Subjects offered:Maths, History

Maths
History

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

MyTutor guarantee

You may also like...

Posts by Hannah

Factorise x² + 2x - 8

How do I analyse a primary source?

Solve the simultaneous equations 2x + y = 7 and 3x - y = 8.

Other GCSE Maths questions

There are 200 students in Year 10. 110 are boys. There are 250 students in Year 11. 140 are boys. Which year has the greater proportion of boys?

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

GCSE 2011: Solve the simultaneous equations: y^2 = 2x + 29 and y = x - 3

What if my equation doesn't factorise?

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