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ELEN [110]
2 years ago
8

Just need the blank answers

Mathematics
1 answer:
Kamila [148]2 years ago
8 0

Answer:

(x+1)(x-1) and x = -1, 1, 2

Step-by-step explanation:

x^2 - 1 factors to (x+1)(x-1)

x+1 = 0; x = -1

x-1 = 0; x = 1

x-2 = 0; x = 2

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Which of the following demonstrates how the 20 is calculated using the combination pattern​
UNO [17]

The combination expression that demonstrates how the 20 is calculated using the combination pattern​ is 6C3

<h3>Permutation and Combination</h3>

While combination has to do with selection, permutation has to do with arrangement.

According to the combination rule

nCr = n!/(n-r)!r!

The expression that gives the result of 20 is expressed below;

6C3 = 6!/(6-3)!3!

6C3 = 6!/3!3!

6C3 = 6!/6*6
6C3 = 720/36
6C3 =20

Hence the combination expression that demonstrates how the 20 is calculated using the combination pattern​ is 6C3

Learn more on combination here: brainly.com/question/4658834

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