# Math Help - Factoring expressions

1. ## Factoring expressions

Hello guys,

The question is:

The following expressions are quadratic expressions. Factorise them, i.e put them in into 2 sets of brackets.

1) x $^2$+4x+3
2) x $^2$-12x+20

Any tips?

Thanks

2. You must write them in the form:

$(x-a)(x-b)= x^2-(a+b)x+ab$

Thus if $x^2+4x+3 = x^2-(a+b)x+ab$, can you find a,b?

Likewise for the other.

3. 1) (x+1)(x+3)
2) (x - 10)(x-2)