2x^2-12x-x-6=0

Simple and best practice solution for 2x^2-12x-x-6=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^2-12x-x-6=0 equation:


Simplifying
2x2 + -12x + -1x + -6 = 0

Reorder the terms:
-6 + -12x + -1x + 2x2 = 0

Combine like terms: -12x + -1x = -13x
-6 + -13x + 2x2 = 0

Solving
-6 + -13x + 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'.
-3 + -6.5x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -6.5x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + -6.5x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -6.5x + x2 = 0 + 3
-6.5x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
-6.5x + x2 = 3

The x term is -6.5x.  Take half its coefficient (-3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
-6.5x + 10.5625 + x2 = 3 + 10.5625

Reorder the terms:
10.5625 + -6.5x + x2 = 3 + 10.5625

Combine like terms: 3 + 10.5625 = 13.5625
10.5625 + -6.5x + x2 = 13.5625

Factor a perfect square on the left side:
(x + -3.25)(x + -3.25) = 13.5625

Calculate the square root of the right side: 3.682729966

Break this problem into two subproblems by setting 
(x + -3.25) equal to 3.682729966 and -3.682729966.

Subproblem 1

x + -3.25 = 3.682729966 Simplifying x + -3.25 = 3.682729966 Reorder the terms: -3.25 + x = 3.682729966 Solving -3.25 + x = 3.682729966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + x = 3.682729966 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + x = 3.682729966 + 3.25 x = 3.682729966 + 3.25 Combine like terms: 3.682729966 + 3.25 = 6.932729966 x = 6.932729966 Simplifying x = 6.932729966

Subproblem 2

x + -3.25 = -3.682729966 Simplifying x + -3.25 = -3.682729966 Reorder the terms: -3.25 + x = -3.682729966 Solving -3.25 + x = -3.682729966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + x = -3.682729966 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + x = -3.682729966 + 3.25 x = -3.682729966 + 3.25 Combine like terms: -3.682729966 + 3.25 = -0.432729966 x = -0.432729966 Simplifying x = -0.432729966

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.932729966, -0.432729966}

See similar equations:

| -4(x)+10=7 | | 4x^2-5x-1071=0 | | 342+-4x=-486 | | x+x+x+x*4=49 | | 3z+6=5z+16 | | 7x-5=2(x-10) | | 3x-(2-x)+4x=7x-2-(-x) | | -3x+20=7x | | -13.00+2.00d=11 | | P=(1+0.033)10 | | 5=25+6 | | 3x+20=-7x | | g(x)=x^2-16 | | 2x-y=5y+6 | | (16x^2+2)-(10x^2-8)+(3x^2-4)= | | 3[5-3(4-y)]=5[3(5y-4)+2]-26 | | 0.2x+1.8=6 | | 3(g-3)=9 | | k-12=m | | x+3x+2=x+1 | | 5(2b-6)=10 | | 235=-x+50 | | -16x+14y= | | 6x=5x-2x^2 | | 20x+34x=23x | | xyz=10 | | 10+0.05=75 | | 3x^3-x^2-108x+36=0 | | 9x^2-6x+81=0 | | 18y+12y=6y | | 5Y+3Y=16 | | 9y-7y-5=34.10 |

Equations solver categories