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The LCD is finding the smallest denominator that makes them both the same.
Do you have any ideas of how to start doing that?
how do i find that?
not sure, sorry
Ok, the two denominators are|dw:1433440171339:dw|
I mean... |dw:1433440214478:dw|
If we multiply the left one by 2, we get a common coefficient|dw:1433440278787:dw|
Do you see how that gives us a common coefficient of 6?
yes, because 2 times 3 is 6?
And we have 2 x's on the left, but only 1 on the right.
So we need to multiply the right side by x to make the number of x's the same
:-) How do you think we can make the number of y's the same?
times it by y?
Close. That would give us:|dw:1433440631552:dw|
So the numbers of y's still aren't quite the same.
ok whats next
It looks like we have 2 y's on the left, but 3 on the left.
you mean 3 on the right?
So, we need one more y on the left.
ok, so do we mulitply again?
Yep, great! So, are the denominators the same now?
Great! So, in the full problem, how do we make that both denominators?
But we can't just change the denominators. We have to also change the numerators to keep everything balanced.
oh, i forgot about that
ow do we do that?
What do we need to multiply by the first denominator to get it to be our LCM?
not sure, sorry.
what do i put in the (?)?
What did we multiply by to get the LCD of the left side?
Was that all?
i think so....
No, |dw:1433442752287:dw| so we need to multiply the left fraction on top and bottom by 2y^2
Can you simplify?
how do i simplify??
multiply the 5 by the 2y^2?
Yep, great! How about the other fraction?
|dw:1433443839427:dw| Like this??
is that all i need to do? @JoannaBlackwelder
please reply i have 20 mins to get this done :( @JoannaBlackwelder
Sorry, I was doing some online tutoring. But no, we didn't multiply by 2y^2 on the right fraction to get the LCD.
We need to multiply the right fraction by x to make common denominators.
i got that part
So, now we can subtract the numerators, and the denominators stay the same.
So, what does that give us?
No, I mean for the whole fraction.
im having a hard time subtracting the bottom
It stays the same. Doesn't subtract.
ohh i see
No, only like terms can add.
so its 10y^2 - 4x/6x^2y^3 is that all??
Well, we can simplify a bit by factoring out a 2
i do have to get this turned in now, if i don't i will get a 0
the 2 on 6 and 10??
Yes, and the 4
You can turn it in like that. You should get partial credit
ok, but if i were to do it some other time what can i do?
ok, thank you for all of your help, sorry that took so long.
And the twos cancel out. |dw:1433447840612:dw|
You're welcome :-)