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frutty [35]
3 years ago
13

What if most common factor of 42 and 15

Mathematics
2 answers:
Lady_Fox [76]3 years ago
7 0
<span>The prime factorization of 15 is: 3 x 5The prime factorization of 42 is: 2 x 3 x 7The prime factors and multiplicities 15 and 42 have in common are: 33 is the gcf of 15 and 42gcf(15,42) = 3</span>
DaniilM [7]3 years ago
4 0
I think it's 3.
1, 2, 3, 6, 7, 14, 21, 42
1,3,5,15
3 is the common factor
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If x2-y2 = 10 and x+y = 5, what is the value of x-y? 2-5?
netineya [11]

Answer:

x-y=2

I don't get why they are asking you what is 2-5. That seems super basic compared to the other question it is with. Since 5-2=3, then 2-5 or -5+2=-3.

Step-by-step explanation:

We are going to use identity x^2-y^2=(x-y)(x+y)

x^2-y^2=10

(x-y)(x+y)=10

(x-y)(5)=10

Since (2)(5)=10, this implies x-y=2.

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