# Math Help - Factorising.. Urgent

1. ## Factorising.. Urgent

this is the first time ive done factorising.. and i dont have my text book to help me..

im stuck on a few things.. and they r all pretty simple.. im just a bit dumb in this area.. lol

1) a^5+a^2... pretty simple.. yet im stuck

2) a(a+b) + 4(a+b)

this is due tomoro

2. Originally Posted by xdomix
this is the first time ive done factorising..

1) a^5+a^2... pretty simple.. yet im stuck
2) a(a+b) + 4(a+b)
Hello,

to 1.:
the greatest common factor is a^2. Put it before the paranthese:
$a^5+a^2=a^2(a^3+1)$

to 2.:
the common factor is the sum in paranthese. Put it itself before a paranthese and you'll get the product you're looking for:
$a(a+b) + 4(a+b)=(a+b)(a+4)$

Greetings

EB