3x^2+x-27=0

Simple and best practice solution for 3x^2+x-27=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 3x^2+x-27=0 equation:


Simplifying
3x2 + x + -27 = 0

Reorder the terms:
-27 + x + 3x2 = 0

Solving
-27 + x + 3x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
-9 + 0.3333333333x + x2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 0.3333333333x + 9 + x2 = 0 + 9

Reorder the terms:
-9 + 9 + 0.3333333333x + x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 0.3333333333x + x2 = 0 + 9
0.3333333333x + x2 = 0 + 9

Combine like terms: 0 + 9 = 9
0.3333333333x + x2 = 9

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.3333333333x + 0.25 + x2 = 9 + 0.25

Reorder the terms:
0.25 + 0.3333333333x + x2 = 9 + 0.25

Combine like terms: 9 + 0.25 = 9.25
0.25 + 0.3333333333x + x2 = 9.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 9.25

Calculate the square root of the right side: 3.041381265

Break this problem into two subproblems by setting 
(x + 0.5) equal to 3.041381265 and -3.041381265.

Subproblem 1

x + 0.5 = 3.041381265 Simplifying x + 0.5 = 3.041381265 Reorder the terms: 0.5 + x = 3.041381265 Solving 0.5 + x = 3.041381265 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 3.041381265 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 3.041381265 + -0.5 x = 3.041381265 + -0.5 Combine like terms: 3.041381265 + -0.5 = 2.541381265 x = 2.541381265 Simplifying x = 2.541381265

Subproblem 2

x + 0.5 = -3.041381265 Simplifying x + 0.5 = -3.041381265 Reorder the terms: 0.5 + x = -3.041381265 Solving 0.5 + x = -3.041381265 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -3.041381265 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -3.041381265 + -0.5 x = -3.041381265 + -0.5 Combine like terms: -3.041381265 + -0.5 = -3.541381265 x = -3.541381265 Simplifying x = -3.541381265

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.541381265, -3.541381265}

See similar equations:

| 8W-9=7W-4 | | 8h-17=64 | | 2(x-1)+1=3 | | H=bh | | 14y-8=118 | | 79=5y-7 | | 5(x-2)-3x-1=391 | | (5x)+3=-2 | | 17=3v | | 5(3x-2)-4x=12 | | 5(x-9)=2(x-4) | | 20x+17=337 | | u+2=3 | | 3(x-2)=4(y+3) | | g-27=-19 | | 6(x+2)-4=5x+8 | | (7x^3)(3x+5)=0 | | 3x-7x=20x-3 | | 4x-28=x-2 | | 64=-10v+4 | | 4x-x+7x=9 | | 7x-8=5x+2x+10 | | 1.1x-0.4x-225000=0 | | 2x-3-9=-x | | 2-7y+5=4y+15-7y | | 5x+4(x-6)=12 | | 5(x-4)+2x=7x-1 | | 15-(x+6)=3x-7 | | 3+4x=5x-6 | | 4v+40=8(v+7) | | 3x-8x+6=7x-1 | | 10+10=(208)+10 |

Equations solver categories