Question

x^2 - 3x^2 + x - 3 factorise

Answer 1

Step-by-step explanation:

Explanation:

Note that in general:

(x+a)(x+b)=x2+(a+b)x+ab

So can we think of two numbers a,b such that a+b=3 and ab=2 ? How about 1 and 2 ?

So:

x2+3x+2=(x+1)(x+2)