find the LCD for rational expressions

find the LCD for rational expressions

Category:

Education

Tags:

• algebra
• math

[Naruto1fanforever]

now why the hell would you need another 5!!!

[robichaudd]

@Naruto1fanforever You need two 5's total because one of the denominators has two 5's as a factor, and the LCD must contain each denominator completely.

LCD = 5*5*7*z^8

First denominator is 5*7*z^8 (yes, the LCD contains that)

Second denominator is 5*5*7*z^5 (yes, the LCD contains that)

[21gunsgirl4]

what if your denomonator is a letter?

[robichaudd]

@21gunsgirl4 Further along in the video there's an example that shows how to handle variables.

[haz634]

so basicly the numerator we just forget about it

[robichaudd]

@haz634 If all you're doing is finding the LCD, then yes, forget about the numerators. If you're then going to add or subtract the fractions you have to bring the numerators back into the picture, like the first problem in the video shows.

[Paulxy6]

oh my god thank you so much i really had no clear way to explain my little brothers how to do it because im used to find it mentally but this will do perfectly keep it up we REALLY do need more teachers like you with this current education

[jediknightanime]

omg this really helped alot..i suck at ath and didnt understand this chapter

thank you!!!!!

If u were my teacher i would actually enjoy math cuz u make it so easy!

[shaytardgirl]

I hope me teach doesnt get mad at me for doing it this way lol I forgot the other way btw we have to do this in fifth grade

[slipknot09atforum]

Thank you, I was looking for a faster method to do this and yours sufficed. :)

[MonkeySult14]

I COULD KISS YOU!!!

[musicbyjamie]

This was sooooo helpful...thanks so much!! Honestly, wish more math teachers explained stuff in this way.

[smithchild80]

Thank you very much. 

[ashcole223]

u sound like Jermey from Code Lyoko :D thats so awesome...math on the other hand sux