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notsponge [240]
4 years ago
15

How to solve 3p^2=-2p+4

Mathematics
1 answer:
harkovskaia [24]4 years ago
6 0

Answer:

Step-by-step explanation:

Simplifying

3p2 + -2p = 4

Reorder the terms:

-2p + 3p2 = 4

Solving

-2p + 3p2 = 4

Solving for variable 'p'.

Reorder the terms:

-4 + -2p + 3p2 = 4 + -4

Combine like terms: 4 + -4 = 0

-4 + -2p + 3p2 = 0

Begin completing the square.  Divide all terms by

3 the coefficient of the squared term:

Divide each side by '3'.

-1.333333333 + -0.6666666667p + p2 = 0

Move the constant term to the right:

Add '1.333333333' to each side of the equation.

-1.333333333 + -0.6666666667p + 1.333333333 + p2 = 0 + 1.333333333

Reorder the terms:

-1.333333333 + 1.333333333 + -0.6666666667p + p2 = 0 + 1.333333333

Combine like terms: -1.333333333 + 1.333333333 = 0.000000000

0.000000000 + -0.6666666667p + p2 = 0 + 1.333333333

-0.6666666667p + p2 = 0 + 1.333333333

Combine like terms: 0 + 1.333333333 = 1.333333333

-0.6666666667p + p2 = 1.333333333

The p term is -0.6666666667p.  Take half its coefficient (-0.3333333334).

Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.

-0.6666666667p + 0.1111111112 + p2 = 1.333333333 + 0.1111111112

Reorder the terms:

0.1111111112 + -0.6666666667p + p2 = 1.333333333 + 0.1111111112

Combine like terms: 1.333333333 + 0.1111111112 = 1.4444444442

0.1111111112 + -0.6666666667p + p2 = 1.4444444442

Factor a perfect square on the left side:

(p + -0.3333333334)(p + -0.3333333334) = 1.4444444442

Calculate the square root of the right side: 1.201850425

Break this problem into two subproblems by setting

(p + -0.3333333334) equal to 1.201850425 and -1.201850425.

Subproblem 1

p + -0.3333333334 = 1.201850425

Simplifying

p + -0.3333333334 = 1.201850425

Reorder the terms:

-0.3333333334 + p = 1.201850425

Solving

-0.3333333334 + p = 1.201850425

Solving for variable 'p'.

Move all terms containing p to the left, all other terms to the right.

Add '0.3333333334' to each side of the equation.

-0.3333333334 + 0.3333333334 + p = 1.201850425 + 0.3333333334

Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000

0.0000000000 + p = 1.201850425 + 0.3333333334

p = 1.201850425 + 0.3333333334

Combine like terms: 1.201850425 + 0.3333333334 = 1.5351837584

p = 1.5351837584

Simplifying

p = 1.5351837584

Subproblem 2

p + -0.3333333334 = -1.201850425

Simplifying

p + -0.3333333334 = -1.201850425

Reorder the terms:

-0.3333333334 + p = -1.201850425

Solving

-0.3333333334 + p = -1.201850425

Solving for variable 'p'.

Move all terms containing p to the left, all other terms to the right.

Add '0.3333333334' to each side of the equation.

-0.3333333334 + 0.3333333334 + p = -1.201850425 + 0.3333333334

Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000

0.0000000000 + p = -1.201850425 + 0.3333333334

p = -1.201850425 + 0.3333333334

Combine like terms: -1.201850425 + 0.3333333334 = -0.8685170916

p = -0.8685170916

Simplifying

p = -0.8685170916

Solution

The solution to the problem is based on the solutions

from the subproblems.

p = {1.5351837584, -0.8685170916}

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mariarad [96]

Answer:

<em>Multiply the bottom equation by -3/2 then add the equations. </em>

<em>Multiply the top equation by-3. then add the equations </em>

<em> </em>

Step-by-step explanation:

Given the simultaneous equation

2x- 6y=6  ... 1

6x - 4y = 2 ... 2

To eliminate a variable, we have to make the coefficient of one of the variable to be the same.

Multiply equastion 1 by -3

-6x+18y= -18  

6x - 4y = 2

Add the result:

-6x + 6x + 18y-4y = -18+2

18y-4y = -18+2

14y = -18

y = -9/7

Another way is to Multiply the bottom equation by -3/2 then add the equations.

Multiplying equation 2 by -3/2 will give;

6x(-3/2) - 4y(-3/2) = 2(-3/2)

-9x + 6y = -3

Add to equation 1;

2x- 6y=6

-9x + 2x + 0 = -3+6

-7x = 3

x = -3/7

Hence the correct two options are;

<em>Multiply the bottom equation by -3/2 then add the equations. </em>

<em>Multiply the top equation by-3. then add the equations </em>

<em> </em>

<em></em>

<em></em>

4 0
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A town's population has been growing linearly. In 2003 the population was 35,000. The population has been growing by 2700 people
stiv31 [10]
2003: 35000
2004: 35000 + 2700 = 37700
2005: 37700 + 2700 = 40400 (and so on)
2006: 43100
2007: 45800
2008: 48500
2009: 51200
8 0
4 years ago
HELP ME PLEASE!<br><br> I need HELP!
vivado [14]

Answer:

103⁰

Step-by-step explanation:

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5 0
2 years ago
Find the surface area of the cylinder. Use 3.14 for pi . a hay bale with a diameter of 30 inches and a height of 72 inches about
valentina_108 [34]

Surface Area of cylinder = 8195.4 inches^2

Step-by-step explanation:

we are given:

Diameter of cylinder = 30 inches

Height of cylinder = 72 inches

We need to find:

Surface area of cylinder = ?

The formula used is:

Surface\,\,Area=2\pi rh+2\pi r^2

We know radius = diameter/2

so, radius = 30/2 = 15 inches

putting values:

Surface\,\,Area=2\pi rh+2\pi r^2\\Surface\,\,Area=2*3.14*15*72+2*3.14*(15)^2\\Surface\,\,Area=6782.4+1413\\Surface\,\,Area=8195.4

So, Surface Area of cylinder = 8195.4 inches^2

Keywords: Surface Area of cylinder

Learn more about Surface Area of cylinder at:

  • brainly.com/question/12613605
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  • brainly.com/question/12041380

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7 0
4 years ago
2 intersecting lines are shown. A line with points M, H, K intersects a line with points L, H, J at point H. 4 angles are create
yulyashka [42]

Answer:

m = 10

Step-by-step explanation:

According to the picture attached, we can see the angles formed.

The angle on the top (5m+100) is sided with the angle 2m+10. This means that they are supplementary angles, their sum is 180°.

So,

5m+100+2m+10 = 180

5m+2m=180-100-10

7m = 70

m = 10

5 0
3 years ago
Read 2 more answers
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