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May 21st

May 21st

# Expressing Fractions in Terms of the LCM of Their Denominators

Part 1: Finding LCM' s of polynomials

To find the LCM ( Least Common Multiple ) of two or more numbers , we factor them and then make sure that the LCM contains enough of each factor so that it can be divided by any one of the original numbers

Question 10 Find the LCM of the expressions :

Question 31 Now you find the LCM of the fol lowing expressions :

Ignore the minus in front of the factor on the second line .

Part 2 Ex press Fractions in Terms of the LCM of Their Denominators
As in numerical fractions in order to add and subtract fractions we need to express them in terms of a common denominator.

Question 34: Write each fraction in terms of the LCM of the denominators.

LCM of the denominators= ab^2

Question 42: Write each fraction in terms of the LCM of the denominators.

LCM= y(y−4)

Question 54:

Factor the denominators

Question 46 Now you write each fraction in terms of the LCM of the denominators:

Question 65:

(x−1)^3 will be the LCM

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