2x^2-x-27=0

Simple and best practice solution for 2x^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 2x^2-x-27=0 equation:


Simplifying
2x2 + -1x + -27 = 0

Reorder the terms:
-27 + -1x + 2x2 = 0

Solving
-27 + -1x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-13.5 + -0.5x + x2 = 0

Move the constant term to the right:

Add '13.5' to each side of the equation.
-13.5 + -0.5x + 13.5 + x2 = 0 + 13.5

Reorder the terms:
-13.5 + 13.5 + -0.5x + x2 = 0 + 13.5

Combine like terms: -13.5 + 13.5 = 0.0
0.0 + -0.5x + x2 = 0 + 13.5
-0.5x + x2 = 0 + 13.5

Combine like terms: 0 + 13.5 = 13.5
-0.5x + x2 = 13.5

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 13.5 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 13.5 + 0.0625

Combine like terms: 13.5 + 0.0625 = 13.5625
0.0625 + -0.5x + x2 = 13.5625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 13.5625

Calculate the square root of the right side: 3.682729966

Break this problem into two subproblems by setting 
(x + -0.25) equal to 3.682729966 and -3.682729966.

Subproblem 1

x + -0.25 = 3.682729966 Simplifying x + -0.25 = 3.682729966 Reorder the terms: -0.25 + x = 3.682729966 Solving -0.25 + x = 3.682729966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 3.682729966 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 3.682729966 + 0.25 x = 3.682729966 + 0.25 Combine like terms: 3.682729966 + 0.25 = 3.932729966 x = 3.932729966 Simplifying x = 3.932729966

Subproblem 2

x + -0.25 = -3.682729966 Simplifying x + -0.25 = -3.682729966 Reorder the terms: -0.25 + x = -3.682729966 Solving -0.25 + x = -3.682729966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -3.682729966 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -3.682729966 + 0.25 x = -3.682729966 + 0.25 Combine like terms: -3.682729966 + 0.25 = -3.432729966 x = -3.432729966 Simplifying x = -3.432729966

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.932729966, -3.432729966}

See similar equations:

| 6(-1)=8-9+6(-1) | | -3h-10=26-12h | | 3x^2+6x-75=0 | | -3h-10=26-12h | | 160=70+(15+3)w | | 5(x-6)-10x= | | 10(v+2)-4v=3(2v+1)-9 | | 10(v+2)-4v=3(2c+1)-9 | | x^2-12x+261=0 | | -7+2d=5 | | -4=1/3(1)+b | | 64x^2+7=0 | | 7h-12=18+h | | 8m^2+5m+16=0 | | 5x^2+8xy+3x^2= | | -8+5x+6x=102 | | 2(a-4)=2(q+5) | | 12-2(3x+4)+2x=8x+15 | | 12(4+h)+5(-2n-9)=18 | | -h-15=-27+2h | | 6(x+9)(x+9)-23(x+9)=4 | | h(p)=p^2+5p+4 | | 22=-5x+3x+8 | | 8(-19)+6-9(-19)=2-(-19)-15 | | 4n-1=16-30n | | 2h-7=25-2h | | R-7=3 | | -5t^2+192+0=h | | 4x-2-5x=-1 | | 7h-2=14+5h | | -5t^2+192=h | | 7t-t-5=5t-3 |

Equations solver categories