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Mathematics 8 Online
OpenStudy (anonymous):

alright i got this much so far can someone help with the rest please 2x^2-6x-36 First look for the GCF GCF=2 Next divide the problem by the GCF 2(x^2-3x-18)

OpenStudy (anonymous):

Divide. What's the problem?

OpenStudy (anonymous):

i dont know the how to do the rest of this i'm trying to explain how to factor but i'm stuck here I know the answer is 2(x+3)(x-6) but i don't know how to get to that point

OpenStudy (anonymous):

Okay! So you want to factorise it.

OpenStudy (anonymous):

yes i'm trying to factor this out

OpenStudy (anonymous):

It's easy. Listen. Divide the middle term ( -3x ) in two part so that when you multiply the two then you get the product equal to first ( x^2 )and last ( -18 ) terms. And if you add the two parts then you get -3x back.

OpenStudy (anonymous):

Here we have x^2-3x-18 So, We have to divide -3x in 2 parts such that their product is -18x^2. Let us divide them -3x in -6x and +3x. If we multiply -6x and +3x then we get -18x^2 and if we add them we get -3x back.

OpenStudy (anonymous):

2(x^2-3x-18)gives me 2(x+3) (x-6) right?

OpenStudy (anonymous):

Yes, right

OpenStudy (anonymous):

Now expression becomes x^2-6x+3x-18 which is equal to x(x-6)+3(x-6) which further becomes (x+3)(x-6)

OpenStudy (anonymous):

Problem Solved. Mission Accomplished. :)

OpenStudy (anonymous):

2x^2-6x-36 First look for the GCF GCF=2 Next divide the problem by the GCF 2(x^2-3x-18) 2(x+3)(x-6) X^2 -6x + 3x -18 x(x-6)+3(x-6) (x+3)(x-6) so it would look like this?

OpenStudy (anonymous):

No. multiply it with 2 also. I just solved the expression.

OpenStudy (anonymous):

where do tou multiply two

OpenStudy (anonymous):

The final would be : 2(x^2-3x-18) 2[x^2 -6x + 3x -18] 2[x(x-6)+3(x-6)] 2(x+3)(x-6)

OpenStudy (anonymous):

oh i got it now thanks dude

OpenStudy (anonymous):

You're welcome. I'm happy to help.

OpenStudy (anonymous):

I'll log out now. I have to go to get a haircut. Tomorrow is my NCC training. Take Care. See You Again. :)

OpenStudy (anonymous):

ok c ya later

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