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elixir [45]
3 years ago
10

Solve 3x^2=-12-6x by completing the square​

Mathematics
1 answer:
Lelu [443]3 years ago
3 0

Answer:

x = - 1 ± i \sqrt{3}

Step-by-step explanation:

Given

3x² = - 12 - 6x ( add 6x to both sides )

3x² + 6x = - 12 ( divide through by 3 )

x² + 2x = - 4

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(1)x + 1 = - 4 + 1

(x + 1)² = - 3 ( take the square root of both sides )

x + 1 = ± \sqrt{-3} = ± i \sqrt{3} ( subtract 1 from both sides )

x = - 1 ± i \sqrt{3}

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timama [110]

Answer:

y=0.5x-2

Step-by-step explanation:

if it is perpendicular to the line y=-2x-6, then you know that its slope is the negative reciprocal of that line, and it has a different y intercept which you need to solve for using the point given. You solve by plugging in the x and y values from the point and plugging in the slope into the standard equation, and solving for b, the y intercept

y=0.5x+b

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7 0
3 years ago
Harry purchased some fruits and sold 1/2 of them at a gain of 60% and 1/4 of them at a
Alborosie

Answer:

40% gain.

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He sold  1/2 ($20 ) for 20 * 1.6 = $32.

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6 0
3 years ago
What is the volume?<br> Volume of pi form ?<br><br> 18=height<br> 10=radius
UNO [17]

Answer:

5652

Step-by-step explanation:

Hi there! Let's solve this problem together.

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Our height is 18, and our radius is 10. Now, let's calculate.

3.14 x 10 squared (100) = 314.

314 multiplied by 18 is 5,652.

The answer is 5652. I hope this helps you!

3 0
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8 0
3 years ago
5617 rounded to the nearest thousand
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5 0
3 years ago
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