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October 20, 2014

October 20, 2014

Posted by **lisa** on Friday, November 18, 2011 at 11:33pm.

2. Find the LCM of 14x^7 and 98x^5

3. Find all numbers for which the rational expression is undefined

5/v-9

- algebra -
**Steve**, Saturday, November 19, 2011 at 12:17amI'll assume that 8+7 is really 8+7v

Note that 64-49v^2 = (8+7v)(8-7v), so that would also be the LCM of those three expressions.

14x^7 = 14x^5 * x^2

98x^5 = 14x^5 * 7

LCM(a,b) = ab/GCD(a,b)

GCD = 14x^5

LCM = 14x^7 * 98x^5 / 14x^5 = 98x^7

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