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romanna [79]
2 years ago
11

Factor completely. x² - 3x² - 4

Mathematics
2 answers:
Ber [7]2 years ago
7 0

Answer:

-2(x^2+2)

Step-by-step explanation:

1. x^2-3x^2-4
= -2x^2-4
2. -2(x^2+2) factor completely :)

Usimov [2.4K]2 years ago
4 0

Answer: - 2 (x² + 2)

Step-by-step explanation:

x² - 3x² - 4 ⇒ -2x² - 4 ⇒ - 2 (x² + 2)    <em>factor out - 2</em>

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Let the probability of success on a Bernoulli trial be 0.26. a. In five Bernoulli trials, what is the probability that there wil
andreyandreev [35.5K]

Answer:

0.3898 = 38.98% probability that there will be 4 failures

Step-by-step explanation:

A sequence of Bernoulli trials forms the binomial probability distribution.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

Let the probability of success on a Bernoulli trial be 0.26.

This means that p = 0.26

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Five trials means that n = 5

4 failures, so 1 success, and we have to find P(X = 1).

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