Question

Factorise x2 + x - 12

Answer 1

$x^2+x-12$
Answer:
$=(x-3)(x+4)$

Answer 2

1,12
2,6
3,4 
thats all 
since its -12 , one will be negative and one will be positive.
since there's 1X, the two numbers differ by 1 only 3 & 4 fit so it's 4+ and -3  
(X+4)*(X-3)