I need to find the least common multiple of x^2-3x, x^2+3x, sorry can't write the problem right.. heh..

Question

parthkohli · Answer

Welcome on the site. 

Do you know how to factor each of them?

nincompoop · Answer

look at what you can use to be able to multiply

$$x(x-3)$$

x^2 + 3 doesn't have a common multiple unless you want to start using imaginary

anonymous · Answer

factored they are x(x-3) and x(x+3)
not sure what to do from here

parthkohli · Answer

Now write dem unique factors down in both your polynomials.

parthkohli · Answer

I mean, take for example these two polynomials:

$(x +1)(x - 3)$ and $(x + 3)(x + 1)$

The unique factors in both the polynomials are $x + 1$, $x - 3$ and $x + 3$. Then multiply to get the lowest common multiple.

anonymous · Answer

so in x(x+3) and x(x-3) the unique ones are (x-3) and (x+3) and multiply them? so 
x^2-9?

nincompoop · Answer

x^2 + 3 doesn't have a common multiple if you are talking about elementary algebra.

parthkohli · Answer

Brr, I read that as $x^2 + 3x$ too. Silly me

nincompoop · Answer

imaginary is intermediate-level

nincompoop · Answer

oh lol!

nincompoop · Answer

in that case 
$$x(x+3)$$

nincompoop · Answer

I didn't know you can edit your question LOL

anonymous · Answer

lolsorry about that

anonymous · Answer

was that right? x^2-9?

parthkohli · Answer

x, x+3 and x-3. Multiply

nincompoop · Answer

yes if you have NO middle term, then you might be looking at + and -

anonymous · Answer

x^2+3x(x-3)=x^3-3x+3x^2-9x=   x^3+3x^2-12x?

anonymous · Answer

right?

nincompoop · Answer

what exactly are you doing?

anonymous · Answer

i don't even know anymore to be honest

nincompoop · Answer

$$x^3+3x^2-12 = x(x^2+3x-12)$$

anonymous · Answer

ah i see..

anonymous · Answer

thanks :)

nincompoop · Answer

try this link http://bit.ly/YFzI2k