2x^2-1x-11=0

Simple and best practice solution for 2x^2-1x-11=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^2-1x-11=0 equation:


Simplifying
2x2 + -1x + -11 = 0

Reorder the terms:
-11 + -1x + 2x2 = 0

Solving
-11 + -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'.
-5.5 + -0.5x + x2 = 0

Move the constant term to the right:

Add '5.5' to each side of the equation.
-5.5 + -0.5x + 5.5 + x2 = 0 + 5.5

Reorder the terms:
-5.5 + 5.5 + -0.5x + x2 = 0 + 5.5

Combine like terms: -5.5 + 5.5 = 0.0
0.0 + -0.5x + x2 = 0 + 5.5
-0.5x + x2 = 0 + 5.5

Combine like terms: 0 + 5.5 = 5.5
-0.5x + x2 = 5.5

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 = 5.5 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 5.5 + 0.0625

Combine like terms: 5.5 + 0.0625 = 5.5625
0.0625 + -0.5x + x2 = 5.5625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 5.5625

Calculate the square root of the right side: 2.358495283

Break this problem into two subproblems by setting 
(x + -0.25) equal to 2.358495283 and -2.358495283.

Subproblem 1

x + -0.25 = 2.358495283 Simplifying x + -0.25 = 2.358495283 Reorder the terms: -0.25 + x = 2.358495283 Solving -0.25 + x = 2.358495283 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 = 2.358495283 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 2.358495283 + 0.25 x = 2.358495283 + 0.25 Combine like terms: 2.358495283 + 0.25 = 2.608495283 x = 2.608495283 Simplifying x = 2.608495283

Subproblem 2

x + -0.25 = -2.358495283 Simplifying x + -0.25 = -2.358495283 Reorder the terms: -0.25 + x = -2.358495283 Solving -0.25 + x = -2.358495283 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 = -2.358495283 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -2.358495283 + 0.25 x = -2.358495283 + 0.25 Combine like terms: -2.358495283 + 0.25 = -2.108495283 x = -2.108495283 Simplifying x = -2.108495283

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.608495283, -2.108495283}

See similar equations:

| 17-1y=y+5 | | 2x+2y=34 | | 20y^2+37y+8=0 | | 14-y=y+2 | | 4d^2+11d-3=0 | | 5x+6c-2=12 | | 3(6z-1)-3(z+7)=8(z+1) | | 15m=16 | | -(4y+1)-(-3y-7)=0 | | 4x*x-13x+7=0 | | 4x^2-7x-8=0 | | 2x+5x^2=12 | | -2-2x=1 | | 0=9x^2+6x-3 | | 21x=-147 | | -2-2x=-1 | | -2-2x=-2 | | 4x*-13x+7=0 | | -2-2x=2 | | 32=-16^2+64t+4 | | 4n+6=35 | | 9x0188 | | 25w^2+90wg+81g^2=0 | | 25w^2+90wg+81g^2 | | 4xx-13x+7 | | 16(3x-8)=4(12x+9) | | 7+10s-2=8s+13-2s | | c^2=-1 | | x^3+6x^2+11x+36=0 | | 50-110=40 | | x^4+3x^3+2x^2+5x-7=0 | | 4t=-36 |

Equations solver categories