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Lisa [10]
3 years ago
12

How to solve 2x^2 - 4x = 3

Mathematics
1 answer:
zhenek [66]3 years ago
6 0

Answer:

1 ± i(1/2)√2

Step-by-step explanation:

Write this quadratic in standard form:  subtract 3 from both sides.  This results in 2x^2 - 4x - 3 = 0.  Let's apply the quadratic formula.  The coefficients of the x terms are 2, -4 and -3, so the discriminant is (-4)^2 - 4(2)(-3), or 16 - 24 = -8.

Following the format of the quadratic formula, we get

     -(-4) ±i2√8       4 ±i2√2        

x = ----------------- = --------------- =  1 ± i(1/2)√2

               4                    4

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Answer:

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Step-by-step explanation:

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3 years ago
5 (u + 1) -<br>7 = 3<br>3 (u - 1) + 2u​
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Correct Question:

5 (u + 1) - 7  = 3 (u - 1) + 2u.

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Answer:

See explanation below

Step-by-step explanation:

In this given question, we are required to find u.

Given the equation:

5 (u + 1) - 7 = 3 (u - 1) + 2u​

Required:

Solve for u

To find u, first simplify both sides individually.

Simply 5 (u + 1) - 7:

Expand the parenthesis:

5u + 5 - 7

Collect like terms:

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<em>Simplify 3 (u - 1) + 2u​:</em>

Expand the parenthesis:

3u - 3 + 2u

Collect like terms:

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Bring both simplified equations together:

5u - 2 = 5u - 3

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Since -2 ≠ -3, there is no solution.

Therefore, we can say the equation is invalid.

3 0
3 years ago
If y = 9 inches, z = 14 inches, h = 5 inches, and w = 4 inches, what is the area of the object?
vekshin1

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Step-by-step explanation:

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1 year ago
A microscope can magnify the object it is looking at 10×4 times. How many times is that? (MCC.8.EE.3) A. 40,000 times B. 40 time
damaskus [11]

Answer:

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Step-by-step explanation:

10^4 is another way to write 10⁴ = 10·10·10·10 = 10,000.

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_____

<em>Comment on the answer choice</em>

The appropriate answer depends on what you mean by your problem statement. Some microscopes magnify 40 times; others magnify 10,000 times, so we cannot tell the appropriate answer using our knowledge of microscopes.

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3 years ago
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lisov135 [29]

Answer:

first option

Step-by-step explanation:

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f(\frac{1}{2x} )

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= \frac{2(2x)}{2x(\frac{1}{2x}+3) }

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