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Mathematics 18 Online
OpenStudy (anonymous):

i need help

OpenStudy (anonymous):

OpenStudy (goldphenoix):

You want to solve x? If so, you want to cross multiply.

OpenStudy (goldphenoix):

We know that 3 * 1 =3 So what's (x-2) * (x) give us?

OpenStudy (anonymous):

2x-2

OpenStudy (goldphenoix):

Not quite. You want to do the distributive property. So what's x(x-2)?

OpenStudy (anonymous):

is it 1x-2

OpenStudy (goldphenoix):

Well. What's x *x give us?

OpenStudy (anonymous):

1x

OpenStudy (goldphenoix):

Nope. Here, I'll give you an example: What's 2 * 2?

OpenStudy (anonymous):

4

OpenStudy (goldphenoix):

Good. What is another way of saying 2 * 2?

OpenStudy (anonymous):

2+2

OpenStudy (goldphenoix):

Nope.

OpenStudy (goldphenoix):

Tip: exponent

OpenStudy (anonymous):

2^2

OpenStudy (goldphenoix):

Great! So what's x *x give us?

OpenStudy (anonymous):

x^2

OpenStudy (goldphenoix):

Great. What's -2 * x?

OpenStudy (anonymous):

-2x^2

OpenStudy (goldphenoix):

Hmm. Tip: There's only one x. So what's it?

OpenStudy (anonymous):

-2x

OpenStudy (anonymous):

\[\frac{ x }{ x }\left( \frac{ x-2 }{ 3 } \right) = \frac{ 1 }{ x }\left( \frac{ 3 }{ 3 } \right)\]\[\frac{ x^2-2x }{ 3x } = \frac{ 3 }{ 3x }\] \[\frac{ x^2-2x-3 }{ 3x } =0\] divide both sides by the denominator , 3x so you're left with \[x^2-2x-3\] which can also be said as (x-3)(x+1) sooo, we can find the values of x by.... x-3=0 or x+1=0 isolate for x on both equations. x=3 or x= -1 there are two solutions to this equation, where the variable x could either be 3 or -1.

OpenStudy (goldphenoix):

Hmm. I think I did something wrong.

OpenStudy (goldphenoix):

Alexeis got it. Good job.

OpenStudy (anonymous):

lol thanks. @GoldPhenoix @Gustavo_xD do you understand what i did ?

OpenStudy (anonymous):

yes thank you

OpenStudy (goldphenoix):

Yes, I understand.

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