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Mrrafil [7]
2 years ago
15

Least common multpliy 15 and 9

Mathematics
2 answers:
valentinak56 [21]2 years ago
5 0

Answer:

Step-by-step explanation:

Least Common Multiple

Factor both numbers

15: 5 * 3

9 ; 3 * 3

The reason you do this is because the LCM has the most number of factors of one factor. That wording is a bit clumsy but it is correct.

So of the 3s you need 2 of them. The third one is less than 3 so it does not count.

Of the the 5s you need 1.

The lowest common multiple, you need 3 * 3 * 5

Answer 9*5 = 45

klemol [59]2 years ago
3 0

Answer:

The LCM of 15 and 9 is 45

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Step-by-step explanation:

Equation at the end of step  1  :

(((12 • (x3)) -  3x2) +  4x) -  1

Equation at the end of step  2  :

(((22•3x3) -  3x2) +  4x) -  1

Checking for a perfect cube :

12x3-3x2+4x-1  is not a perfect cube

Trying to factor by pulling out :

Factoring:  12x3-3x2+4x-1

Thoughtfully split the expression at hand into groups, each group having two terms :

Group 1:  4x-1

Group 2:  12x3-3x2

Pull out from each group separately :

Group 1:   (4x-1) • (1)

Group 2:   (4x-1) • (3x2)

              -------------------

Add up the two groups :

              (4x-1)  •  (3x2+1)

Final result :

(3x2 + 1) • (4x - 1)

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