factor the trinomial

3a+30a^2+72a

Question

factor the trinomial 

3a+30a^2+72a

anonymous · Answer

factor out a 3

anonymous · Answer

can you take me step by step pn how to do this, I am so confused

anonymous · Answer

15a(5+2a)

anonymous · Answer

all of the numbers are divisible by 3 correct

anonymous · Answer

sorry misread question start by adding like terms

anonymous · Answer

all of the numbers are divisible by 15 and they all have a variable of a in them...so, pull out 15a and then you are left with (5+2a). So your answer is 15a(5+2a)

anonymous · Answer

that is what I got for the number and it advised that I was wrong and I needed to find the gcf first then do the rest, could this be a prime

anonymous · Answer

sorry class ended and just got back to dorm one sec let me do the problem

anonymous · Answer

k thanks

anonymous · Answer

here try this 3 (10 a^2+a+24)

anonymous · Answer

wait lost an a there...

anonymous · Answer

ok ya try factoring out a 3 from 3a+30a^2+72a to get a+10a^2+24a

anonymous · Answer

a+10a^2+24a=10a^2+25 
factor out a 5 to get 5a(2a^2+5)

anonymous · Answer

factor out a 5a my bad

anonymous · Answer

it said the answe was 3a(a+6) (a+4).  here is another one 3a^3+21a^2+36,

I know that the GCF is 3a but i do not know what to do after that please help