Friday

April 18, 2014

April 18, 2014

Posted by **Aria** on Tuesday, August 2, 2011 at 1:58am.

Find The LCM for

#1

2(R-7) and 14(R-7)

#2

(1+4r), (1-16r^2), and (1-4r)

It seems like #1 is already at the LCM

and #2 would be (1+4r)(1-4r)

Am I even vaguely correct?

Thanks for your help.

- Algebra -
**MathMate**, Tuesday, August 2, 2011 at 8:53amAs you probably know, if one number is a multiple of the other, the bigger number is the LCM of the two.

Post your exact answer to #1 to confirm if you wish.

For #2, you are more than vaguely correct, but you do not appear to have any justification of your response.

You can confirm your thoughts by dividing the LCM by each of the three values. If they all divide without remainder,*and*there is no common factor between the quotients, the answer is correct.

For example,

If 60 is the LCM of 5,6,15, then

60/5=12 has no remainder

60/6=10 has no remainder

60/15=5 has no remainder.

However,

5,10 and 12 have a common factor of 2, so 60 is*not*the LCM, but 60/2=30 is!

Feel free to post your justification of your answer along the lines above.

**Related Questions**

algebra - 1.FIND THE LCM OF 10X^7 AND 50X^4 2.FIND THE LCM OF x^2 -36 AND x^2 + ...

math, algebra - Can someone check this for me : Find the gcf for each of hte ...

algebra - Find all numbers for which the rational expression is underfined: r^2-...

math - If the answer is 1-2/3m what is the question> How can you solve ...

ALGEBRA - add (r-7s+2)+(4r+6s)+(s+5) do i add like terms: (4r^2)+(-2s)+(7)

Math - Can someone check my answers for me pls? True or False LCM of 10 and 18 ...

algebra - Find the LCM 10b^6 c^6, 5b^5 c^4, 14b^3 c^7 What is the LCM? I came up...

algebra - Find the LCM 10b^6 c^6, 5b^5 c^4, 14b^3 c^7 What is the LCM? I came up...

algebra - 1. Find the LCM of (8+7), (64-49v^2), and (8-7v) 2. Find the LCM of ...

Algebra - Could I get some help Please!!!!!!!!! (1) Find the LCD 3/3v^2-3v-7/3v-...