How do you find the solutions of xsquared-2x=3?

Mathematics

1 answer:

Vera_Pavlovna [14]4 years ago

4 0

Answer:

-1 and 3

Step-by-step explanation:

We need to solve "xsquared-2x=3"

The following version of xsquared-2x=3 has more appropriate format:

x² - 2x = 3

We need to put this into standard form for quadratic equations. To accomplish this, subtract 3 from both sides, obtaining:

x² - 2x - 3 = 0

This factors as follows: (x - 3)(x + 1) = 0.

The solutions are found by setting each factor = 0 separately and solving for x: 3 and -1.

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The population f(x), in millions, of State A of a country after x years is represented by the function shown below: f(x) = (1.08

GuDViN [60]

-- State-A . . . Population = 1 · (1.08)ˣ

-- State-B . . . Population = 2 · (1.08)ˣ

' x ' = number of years after the original population
At the beginning, x=0.
Any quantity raised to the zero power = 1.
At the beginning, when x=0, the original populations were
State-A = 1 · 1 = 1
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The original population of State A was half of
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3 years ago

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A swimming pool has has to be drained for maintenance the pool shaped like a cylinder with a diameter of 8 meters and a depth of

Alexandra [31]

Step 1: find the radius
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Step 2: square the radius.
8^2 = 64

Step 3: plug into formula
pi * radius squared * height
3.14 * (64) * (1.8) = 361.728 m^3
The volume of the pool is 361. 728 meters cubed.

Step 4: Divide volume by the amount pumped out per hour
volume / amount pumped out = amount of hours
361.728/16 = 22.608 hours.

So your answer is approximately 23 hours.

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3 years ago

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W usng a calculator, paper and pencil, or mental math.

Paraphin [41]

Answer:

Mandy will take 67.5 mins to complete the 15 km race.

Step-by-step explanation:

Given:

Mandy runs 4 km in 18 min

She plans to run in a 15 km race.

We need to find how much time required to run 15 km.