3x^2-12x-2=0

Simple and best practice solution for 3x^2-12x-2=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^2-12x-2=0 equation:


Simplifying
3x2 + -12x + -2 = 0

Reorder the terms:
-2 + -12x + 3x2 = 0

Solving
-2 + -12x + 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'.
-0.6666666667 + -4x + x2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + -4x + 0.6666666667 + x2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + -4x + x2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + -4x + x2 = 0 + 0.6666666667
-4x + x2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
-4x + x2 = 0.6666666667

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 0.6666666667 + 4

Reorder the terms:
4 + -4x + x2 = 0.6666666667 + 4

Combine like terms: 0.6666666667 + 4 = 4.6666666667
4 + -4x + x2 = 4.6666666667

Factor a perfect square on the left side:
(x + -2)(x + -2) = 4.6666666667

Calculate the square root of the right side: 2.160246899

Break this problem into two subproblems by setting 
(x + -2) equal to 2.160246899 and -2.160246899.

Subproblem 1

x + -2 = 2.160246899 Simplifying x + -2 = 2.160246899 Reorder the terms: -2 + x = 2.160246899 Solving -2 + x = 2.160246899 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 2.160246899 + 2 Combine like terms: -2 + 2 = 0 0 + x = 2.160246899 + 2 x = 2.160246899 + 2 Combine like terms: 2.160246899 + 2 = 4.160246899 x = 4.160246899 Simplifying x = 4.160246899

Subproblem 2

x + -2 = -2.160246899 Simplifying x + -2 = -2.160246899 Reorder the terms: -2 + x = -2.160246899 Solving -2 + x = -2.160246899 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -2.160246899 + 2 Combine like terms: -2 + 2 = 0 0 + x = -2.160246899 + 2 x = -2.160246899 + 2 Combine like terms: -2.160246899 + 2 = -0.160246899 x = -0.160246899 Simplifying x = -0.160246899

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.160246899, -0.160246899}

See similar equations:

| -3x-8y-10x+2y= | | 2x+x=78 | | 3x^2+13x-1=9 | | 4s^2+20s=-25 | | -11-7= | | 12+x=6 | | .5(8a+4)=18 | | (2a-4)-(10-(4a+7))= | | 8x^2-10x-3=0 | | 3x^2-13x-1=9 | | 7z+2z-4=59 | | 6a-9a=5 | | x^2+2x=99 | | 2(-3x+1)+8(x-4)=0 | | X^4-7x^3-18x^2=0 | | 2x+-3=10x+21 | | 15x-39=14x-43 | | 14x+4=11x+22 | | x^2-8x+2=0 | | v^2=36-5v | | 4(4x-3)=14 | | 8x-35=12x+25 | | 4x+5=2x-11 | | 12=4(x-5)+8 | | 2x-56=9x | | 4x^2+10x-3=5 | | 5=y-x | | (5x+3a-7x)+(2b+3a-1)= | | 5n-4=-10 | | 4x^2+3x-10=0 | | 60x^2+69x+18=0 | | -36x^2-30x-4=0 |

Equations solver categories