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Anarel [89]
3 years ago
12

Can someone PLEASE solve this quadratic equation by factoring with the steps? :(

Mathematics
1 answer:
salantis [7]3 years ago
5 0

Answer:

There are no simple factors to this expression.  You can however solve for x, giving you:

x = -1 ± √(y + 3)

Step-by-step explanation:

There is no simple pair of factors to this equation, so we'll have to go through the full process.  You can see that by observing that there is no pair of rational numbers that add to make 2 and multiply to make -2.  We can however solve for x:

y = x^2 + 2x - 2\\y + 2 = x^2 + 2x\\y + 3 = x^2 + 2x + 1\\y + 3 = (x + 1)^2\\(x + 1)^2 = y + 3\\x + 1 = \pm \sqrt{y + 3}\\x = -1 \pm \sqrt{y + 3}

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What is the equation of the following line written in general form? (The y-intercept is 7.)
Viktor [21]

Answer:

<h2>3x - y + 7 = 0</h2>

Step-by-step explanation:

The slope-intercept form of an equation of a line:

y=mx+b

m - slope

b - y-intercept

Put the given y-intercept b = 7 and the coordinates of the point (-2, 1) to the equation:

1=-2m+7          <em>subtract 7 from both sides</em>

-6=-2m       <em>divide both sides by (-2)</em>

3=m\to m=3

We have the equation:

y=3x+7

Convert it to the general form Ax+By+C=0:

y=3x+7              <em>subtract 3x and 7 from both sides</em>

-3x+y-7=0           <em>change the signs</em>

3x-y+7=0

4 0
3 years ago
3125x=−62 value of x.
Papessa [141]

Answer:

x= -0.01984

Step-by-step explanation:

You divide both sides by 3125 to get x alone.

You get x=-0.01984

Hope this helps!

5 0
3 years ago
12.
g100num [7]

Answer:

Step-by-step explanation:

tan^{-1} (\frac{\sqrt{3} }{3} )=x\\tan x=\frac{\sqrt{3} }{3} =tan (\frac{\pi}{6} )\\x=\frac{\pi}{6}

7 0
3 years ago
If there are 50 steady beats in 30 seconds, how many steady beats would there be in 2 minutes
notka56 [123]

Answer:

200

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Answers :<br> A:6.6<br> B:7.2<br> C:7.8<br> D8.1
OLga [1]

Answer:

approx 7.81 Exactly: √61

Step-by-step explanation:

Use Pythag theorem: 5^2 + 6^2 = hyp^2 (line AS)

25 + 36 = 61

hyp = √61 or about 7.81

8 0
3 years ago
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