3x^2-12x-208=0

Simple and best practice solution for 3x^2-12x-208=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-208=0 equation:


Simplifying
3x2 + -12x + -208 = 0

Reorder the terms:
-208 + -12x + 3x2 = 0

Solving
-208 + -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'.
-69.33333333 + -4x + x2 = 0

Move the constant term to the right:

Add '69.33333333' to each side of the equation.
-69.33333333 + -4x + 69.33333333 + x2 = 0 + 69.33333333

Reorder the terms:
-69.33333333 + 69.33333333 + -4x + x2 = 0 + 69.33333333

Combine like terms: -69.33333333 + 69.33333333 = 0.00000000
0.00000000 + -4x + x2 = 0 + 69.33333333
-4x + x2 = 0 + 69.33333333

Combine like terms: 0 + 69.33333333 = 69.33333333
-4x + x2 = 69.33333333

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 = 69.33333333 + 4

Reorder the terms:
4 + -4x + x2 = 69.33333333 + 4

Combine like terms: 69.33333333 + 4 = 73.33333333
4 + -4x + x2 = 73.33333333

Factor a perfect square on the left side:
(x + -2)(x + -2) = 73.33333333

Calculate the square root of the right side: 8.563488386

Break this problem into two subproblems by setting 
(x + -2) equal to 8.563488386 and -8.563488386.

Subproblem 1

x + -2 = 8.563488386 Simplifying x + -2 = 8.563488386 Reorder the terms: -2 + x = 8.563488386 Solving -2 + x = 8.563488386 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 = 8.563488386 + 2 Combine like terms: -2 + 2 = 0 0 + x = 8.563488386 + 2 x = 8.563488386 + 2 Combine like terms: 8.563488386 + 2 = 10.563488386 x = 10.563488386 Simplifying x = 10.563488386

Subproblem 2

x + -2 = -8.563488386 Simplifying x + -2 = -8.563488386 Reorder the terms: -2 + x = -8.563488386 Solving -2 + x = -8.563488386 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 = -8.563488386 + 2 Combine like terms: -2 + 2 = 0 0 + x = -8.563488386 + 2 x = -8.563488386 + 2 Combine like terms: -8.563488386 + 2 = -6.563488386 x = -6.563488386 Simplifying x = -6.563488386

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.563488386, -6.563488386}

See similar equations:

| 5+5-8+8+8+8+8=26 | | 8b-5=2-(-7b+6) | | 14w+6+2=52+12w+60 | | x+1=7x+31 | | 6x^3+4x^2-18x-12=0 | | 8xn=81 | | 1.6x+15.20=x | | -2u+3=-7u-7 | | 4x-10+3.5= | | 4s-12= | | 6t=2t+4 | | x^2+ix+1=0 | | 39+3z=144-2z | | 2x+6x+21=13 | | 2(16)-20=Y | | -x-7y=6 | | 16=0.5(20+Y) | | -6y+2x=2 | | 1.25z-6.75=8-2.30z | | -12-5n=2(3n+5) | | 6y-12=6y+12 | | (4b-5)(b-4)=0 | | R+3.14=3.14 | | 30=3.8-2.5 | | 4x-2y=-32 | | 8(6-5x)-2(3-x)=29 | | 2x-3=3(x-4)+7 | | -23.168=1.3n+3.1n | | 6p^2+18p-240=0 | | mx^2+6x+3=0 | | 13x-7+2x=9 | | 17-(5-q)=2(5q-16) |

Equations solver categories