748 views

### Solve the quadratic equation x^2 + 3x + 2 = 0, by factorisation.

We need two numbers, a and b, such that a*b = 2 and a+b=3

Looking at the equation it can be seen that 2 and 1 fulfill these conditions.

Therefore x2 +3x +2=0
= (x+2)(x+1)=0

This means we need either x+2 or x+1 to equal 0
x+2=0 so x= -2
or x+1=0 so x= -1

Therefore x= (-1 , -2)

2 years ago

Answered by Sophie, a GCSE Maths tutor with MyTutor

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

#### 803 SUBJECT SPECIALISTS

£18 /hr

Degree: Environmental Geoscience (Bachelors) - Durham University

Subjects offered:Maths, Geology+ 2 more

Maths
Geology
Geography
Chemistry

“Third year Earth Sciences student at Durham; specialise in geochemistry and tutor in Earth sciences, Chemistry and Maths”

Trusted by schools

|  4 completed tutorials

£18 /hr

Degree: MPhys Physics (Integrated Masters) - Oxford, St Edmund Hall University

Subjects offered:Maths, Physics+ 2 more

Maths
Physics
Further Mathematics
.PAT.

“Enthusiastic and experienced Oxford undergraduate with a passion for maths and physics”

£18 /hr

Degree: Medicine (Bachelors) - University College London University

Subjects offered:Maths, English Literature+ 4 more

Maths
English Literature
Biology
-Personal Statements-
-Medical School Preparation-

“Hello! I'm a 3rd year medical student with a passion for inspiring enthusiasm and making the subjects I tutor fun and easy for my students.”

£22 /hr

Degree: Biochemistry (MBiochem) (Masters) - St. Andrews University

Subjects offered:Maths, Science+ 3 more

Maths
Science
Physics
Chemistry
Biology

“I study biochemistry at the University of St Andrews. Passionate about science and uses student led sessions ensure understanding and progress at their own pace”

### You may also like...

#### Posts by Sophie

Describe the reflex arc.

Solve the quadratic equation x^2 + 3x + 2 = 0, by factorisation.

Solve the simultaneous equations 2x + 3y = 4, 3x + 6y = 3

What is a metabolic rate?

#### Other GCSE Maths questions

If f(x)=7-4x, given that f(c)=9, find c

Make n the subject of the formula: m = 5n - 21

Solve 3(x+4) = 18

At the supermarket, Ben buys 5 apples and 3 pears, at a total cost of £3.70. Jenny buys 6 apples and 6 pears, costing £5.40. Construct two simultaneous equations to work out the price, in pence, of apples and pears.

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