12x^2+x-8=0

Simple and best practice solution for 12x^2+x-8=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 12x^2+x-8=0 equation:


Simplifying
12x2 + x + -8 = 0

Reorder the terms:
-8 + x + 12x2 = 0

Solving
-8 + x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
-0.6666666667 + 0.08333333333x + x2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + 0.08333333333x + 0.6666666667 + x2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + 0.08333333333x + x2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + 0.08333333333x + x2 = 0 + 0.6666666667
0.08333333333x + x2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
0.08333333333x + x2 = 0.6666666667

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

Add '0.25' to each side of the equation.
0.08333333333x + 0.25 + x2 = 0.6666666667 + 0.25

Reorder the terms:
0.25 + 0.08333333333x + x2 = 0.6666666667 + 0.25

Combine like terms: 0.6666666667 + 0.25 = 0.9166666667
0.25 + 0.08333333333x + x2 = 0.9166666667

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.9166666667

Calculate the square root of the right side: 0.957427108

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.957427108 and -0.957427108.

Subproblem 1

x + 0.5 = 0.957427108 Simplifying x + 0.5 = 0.957427108 Reorder the terms: 0.5 + x = 0.957427108 Solving 0.5 + x = 0.957427108 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.957427108 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.957427108 + -0.5 x = 0.957427108 + -0.5 Combine like terms: 0.957427108 + -0.5 = 0.457427108 x = 0.457427108 Simplifying x = 0.457427108

Subproblem 2

x + 0.5 = -0.957427108 Simplifying x + 0.5 = -0.957427108 Reorder the terms: 0.5 + x = -0.957427108 Solving 0.5 + x = -0.957427108 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.957427108 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.957427108 + -0.5 x = -0.957427108 + -0.5 Combine like terms: -0.957427108 + -0.5 = -1.457427108 x = -1.457427108 Simplifying x = -1.457427108

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.457427108, -1.457427108}

See similar equations:

| 1/2(2m-16)=1/3(2m+4) | | 26a+9(-24a-28)=-23(a+40) | | s+s+.89=92.99 | | 6n-9n+4= | | 2(7-5y)-3y=-35 | | -2x+19=2x+3 | | 6(w+2)+4w=-38 | | a-0.8=12 | | 2c+6=1-3c | | 3x*15=90 | | 7x+24=3x+4 | | 6x+34=18 | | 4p-12=29 | | x-18y=-165 | | 13x+7=30x | | 2x-(-20)=2x+4 | | 1.5x^2-15=0 | | 6x+6(x-3)=-6 | | y-2.99=1.7 | | 18-q=-11 | | 3-4x-3x=3 | | 6(v+6)-8v=24 | | (x-8)2=161 | | A-b+15= | | -(-2+v)=2 | | -0.8+0.8= | | 2x+6=x-7 | | 7x+28=3x | | x^2+8=161 | | -20+28= | | 3-4x=-30 | | -30=3(u-4)-5u |

Equations solver categories