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Mashcka [7]
3 years ago
7

Find all roots. 11) x^3 + 6x² + 5x = 0

Mathematics
1 answer:
Dmitrij [34]3 years ago
5 0

Answer:

x=0

x=-1

x=-5

Step-by-step explanation:

To find the roots, we set the equation equal to zero and factor.

x(x²+6x+5)=0           [factor]

x(x+1)(x+5)=0            [set each factor equal to 0]

x=0

x+1=0                       [subtract both sides by 1]

x=-1

x+5=0                      [subtract both sides by 5]

x=-5

Now, we have found three roots, x=0, x=-1, x=-5.

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Adding the probabilities: 0 + 0.3 + 0.1 + 0.3 + 0.3 = 1

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C) Expected value is calculated by

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P(X=0) = 0

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