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sp2606 [1]
3 years ago
12

Using the quadratic formula to solve 2x2 = 4x – 7, what are the values of x? 2 plus-or-minus StartRoot 10 EndRoot i 1 plus-or-mi

nus StartRoot 10 EndRoot i StartFraction 2 plus-or-minus StartRoot 10 EndRoot i Over 2 EndFraction 1 plus-or-minus StartRoot 5 EndRoot i

Mathematics
2 answers:
grigory [225]3 years ago
8 0

Answer:

C. (Check Attached image)

Step-by-step explanation:

I'm too lasy to explain but to summarize,

- add -2x^2 to both sides

- then plug the numbers into the right places

(Google quadratic formula if you don't remember)

- solve

This post was made by the quadratic Formula gang because factoring is lame.

ioda3 years ago
7 0

Answer:

x = 1 +/- \frac{i\sqrt{10} }{2}

Step-by-step explanation:

The equation given is:

2x^2 = 4x - 7\\\\2x^2 - 4x + 7 = 0

Using quadratic formula:

x = \frac{-b +/- \sqrt{b^2 - 4ac} }{2a}

From the question:

a = 2, b = -4, c = 7

Therefore:

x = \frac{4 +/- \sqrt{(-4)^2 - 4 * 2 * 7} }{2 * 2}\\\\x = \frac{4 +/- \sqrt{(16 - 56)} }{4}\\\\x = \frac{4 +/- \sqrt{-40} }{4}\\

=> x = 1 +/- \frac{i\sqrt{10} }{2}

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How to subtract 200 - 300 and divide 200 - 300
meriva

Answer:65544654646

Step-by-step explanation:

7 0
2 years ago
True or False: The endpoints of a polygon must conform to snap points, whereas the edges of an area are not confined by snap poi
fgiga [73]

For this case, what we should know is that a polygon is a geometric figure with n sides that is closed. It is usually the union of straight lines.

On the other hand, in order to find the area of a figure, we need it to be closed.

Therefore, the edges of an area are confined by snap points.

Answer:

FALSE

3 0
3 years ago
Read 2 more answers
The equation 2x² + 2y2 – 8x - 12y + 16 = 0 defines a circle.
mixas84 [53]

Answer:

  C, E

Step-by-step explanation:

Here, we want to change the equation of a circle from general form to standard form. This is done by making the leading coefficients 1, completing the squares, and then rewriting the equation in standard form.

The leading coefficients of the given equation are 2, so we first want to divide by 2. This gives ...

  x² +y² -4x -6y +8 = 0

Subtracting 8 puts us in better position to complete the squares.

  x² +y² -4x -6y = -8

Now, we can add the squares of half the coefficients of the linear terms.

  (x² -4x +4) +(y² -6x +9) = -8 +13 . . . . . . matches C

And we can simplify this to the standard form equation:

  (x -2)² +(y -3)² = 5 . . . . . matches E

3 0
2 years ago
The scale on a map says that 2 inches = 150 miles. If two cities are actually 325 miles apart, how many inches apart will they b
vodomira [7]
150/2= 75(that is the diff)
75*325= 24375 (answer)
4 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=3%5Csqrt%7Bx%7D%20-1%5Cleq%2012" id="TexFormula1" title="3\sqrt{x} -1\leq 12" alt="3\sqrt{x} -
densk [106]

Answer:

0≤x≤169/9

Step-by-step explanation:

6 0
3 years ago
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