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This video works several example problems showing how to find the Least Common Multiple (LCM) of Polynomials

Lowest Common Multiple Calculator

Step 1.Write out a list of multiples for each number.

Step 3. The number found on each list will be your LCM or Lowest Common Multiple in this example it is 60

Step 2. Cross out numbers that are not found on each list.

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Greatest common factor

100

120

Common multiple calculator

Find the lowest common multiple ( lcm ) of 5 and 6

Prime factorization of 5 = 10 15 20 25 30

Prime factorization of 6 = 12 18 24 30

30 = the LCM

Find the lowest common multiple ( lcm ) of 4 ,12 , and 30

Prime factorization of 4= 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60

Prime factorization of 12= 24, 36, 48 ,60

Prime factorization 30= 60

60= the LCM

Follow these steps to find the LCM of polynomials

1. Factor

2. Write each factor,not duplicating the "common" ones

3. Multiply these factors together

For example: Find the LCM of 4x^2 and 10xy

Step 1. Factor 4x^2 = 2*2 x*x 10xy = 2*5 x*y

Step 2. Write down each factor and not duplicate common ones

2*2*5*x*x*y

Step 3. Multiply these together 20x^2y

These problems are difficult to explain verbally. I feel watching someone work several examples will help understanding.

Common Core Standard: 6.NS.B.4 6th Grade Math