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mafiozo [28]
2 years ago
11

Which of the following equations is the result of completing the square on x^2 - 6x - 9 = 0?

Mathematics
1 answer:
azamat2 years ago
3 0

Answer:

x = 3 +- √18

Step-by-step explanation:

By completing the square method

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The type of government where the president and its Congress weer controlled by the same party is one which is democratic and has such specific laws.

<h3>What is a System of Government?</h3>

This refers to the different ways in which a sovereign nation makes its laws and also makes policies that affects its citizens.

There are different systems of government and some of them includes:

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Four triangles are shown. One side of each triangle lies on a ray, and the triangles are not drawn to scale. Based on these tria
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95. Because atoms, molecules, and ions are very small, they are counted in units of moles, where 1 mole = 6.022 × 1023 molecules
Galina-37 [17]

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There are 10⁻⁷ hydrogen ions in one-liter water

Step-by-step explanation:

Hi there!

a. If the pH = 7.0, then:

-log(H) = 7.0

multiply both sides of the equation  by -1

log(H) = -7.0

Apply 10ˣ to both sides

10^(log (H)) = 10⁻⁷

(H) = 10⁻⁷

There are 10⁻⁷ hydrogen ions in one-liter water.

Why 10^(log (H)) = (H)?

Let´s consider this function:

y = 10^(log x)

(Apply log to both sides)

log y = log 10^(log x)

(Apply logarithmic property: log xᵃ = a · log x)

log y = log x · log 10

(log 10 = 1)

log y = log x

y = x

(since y =  10^(log x) and y = x):

10^(log x) = x

That´s why 10^(log (H)) = (H)

7 0
3 years ago
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