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Mathematics 16 Online
OpenStudy (a1234):

3/(s - 1) + 1 = 12/(s^2 - 1)

OpenStudy (skullpatrol):

please show your work @a1234

OpenStudy (a1234):

I got as far as this, though I'm pretty sure I did it wrong.\[12/(s^2 - 1) - 3/(s - 1) - 1\]

OpenStudy (a1234):

= 0

OpenStudy (a1234):

@skullpatrol Will you help me?

OpenStudy (skullpatrol):

what do you think you should do next?

OpenStudy (a1234):

I don't know.

OpenStudy (skullpatrol):

what grade is this for?

OpenStudy (a1234):

9th

OpenStudy (skullpatrol):

Find the LCD.

OpenStudy (a1234):

s^2 - 1?

OpenStudy (skullpatrol):

yes

OpenStudy (a1234):

Now what do I do?

OpenStudy (skullpatrol):

rewrite each fraction using the LCD

OpenStudy (a1234):

Like this?|dw:1399610300449:dw|

OpenStudy (a1234):

*s^2 - 1

OpenStudy (skullpatrol):

|dw:1399610550832:dw|

OpenStudy (a1234):

Then how is it done?

OpenStudy (skullpatrol):

Do you recall how to rewrite a fraction?

OpenStudy (skullpatrol):

$$\Huge\frac{a}{b}=\frac{ca}{cb}$$

OpenStudy (a1234):

So should it all be multiplied by s^2 - 1?

OpenStudy (skullpatrol):

yes

OpenStudy (a1234):

Oh ok...like this:|dw:1399611015222:dw|

OpenStudy (skullpatrol):

nope

OpenStudy (a1234):

Can you tell me where I'm going wrong?

OpenStudy (skullpatrol):

|dw:1399613949426:dw|

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