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3 years ago

15 Points!

1 answer:

6 0

$5; -3; -1 -2i$
<span>In polynomials we have not of an imaginary unit (i), therefore we have the fourth zeros -1-2i.</span>

$f(x)=(x-5)(x+3)\left[x-(-1-2i)\right]\left[x-(-1+2i)\right]\\\\=(x^2+3x-5x-15)[x^2-x(-1+2i)-x(-1-2i)+(-1)^2-(2i)^2]\\\\=(x^2-2x-15)(x^2+x-2i+x+2i+1+4)\\\\=(x^2-2x-15)(x^2+2x+5)\\\\=x^4+2x^3+5x^2-2x^3-4x^2-10x-15x^2-30x-75\\\\=x^4-14x^2-40x-75$

Answer: B)

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Answer:

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Step-by-step explanation:

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3 years ago

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Tomtit [17]

To solve the question we use the following analogy:
Given that the odds of winning is a/b, then the probability is b/(a+b)
hence to solve the question we proceed as follows:

a]
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simplifying this gives us:
25/11

b] P(E)=31/36
odds against E=(36-31)/31
simplifying this we get:
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c]P(E)=32/36
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d]
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odds against E will be:
(36-30)/36
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3 years ago

Solve the logarithmic equation. Show steps

Morgarella [4.7K]

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2 years ago