Factorisation Lesson 3

Question 1

Factorise: x2 + 3x + 2

x2 -3x -10

Answer 1

First:

2=?
2=2x1
2+1=3

Second:

• 10=-5x2
• 5+2=-3

Third:

(x + 2) (x + 1)
(x + 2) (x - 5)

Finally:

x + 1
x - 5