x*x+12x-126=0

Simple and best practice solution for x*x+12x-126=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 x*x+12x-126=0 equation:


Simplifying
x * x + 12x + -126 = 0

Multiply x * x
x2 + 12x + -126 = 0

Reorder the terms:
-126 + 12x + x2 = 0

Solving
-126 + 12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '126' to each side of the equation.
-126 + 12x + 126 + x2 = 0 + 126

Reorder the terms:
-126 + 126 + 12x + x2 = 0 + 126

Combine like terms: -126 + 126 = 0
0 + 12x + x2 = 0 + 126
12x + x2 = 0 + 126

Combine like terms: 0 + 126 = 126
12x + x2 = 126

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = 126 + 36

Reorder the terms:
36 + 12x + x2 = 126 + 36

Combine like terms: 126 + 36 = 162
36 + 12x + x2 = 162

Factor a perfect square on the left side:
(x + 6)(x + 6) = 162

Calculate the square root of the right side: 12.727922061

Break this problem into two subproblems by setting 
(x + 6) equal to 12.727922061 and -12.727922061.

Subproblem 1

x + 6 = 12.727922061 Simplifying x + 6 = 12.727922061 Reorder the terms: 6 + x = 12.727922061 Solving 6 + x = 12.727922061 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 12.727922061 + -6 Combine like terms: 6 + -6 = 0 0 + x = 12.727922061 + -6 x = 12.727922061 + -6 Combine like terms: 12.727922061 + -6 = 6.727922061 x = 6.727922061 Simplifying x = 6.727922061

Subproblem 2

x + 6 = -12.727922061 Simplifying x + 6 = -12.727922061 Reorder the terms: 6 + x = -12.727922061 Solving 6 + x = -12.727922061 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -12.727922061 + -6 Combine like terms: 6 + -6 = 0 0 + x = -12.727922061 + -6 x = -12.727922061 + -6 Combine like terms: -12.727922061 + -6 = -18.727922061 x = -18.727922061 Simplifying x = -18.727922061

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.727922061, -18.727922061}

See similar equations:

| 5x-(3x-4)=14 | | 2x-5+6=0 | | 1=11-x | | a+(-7)=-9 | | 3(-3m)=3m-6 | | 5x^2+35x+60=75 | | 28-4b=4+4x | | 9=13-x | | -6(4x-2)=-2(3+6x) | | 2x^2-2x-12=x^2-6x | | x^2-2x+1=36 | | x*x+12x-26=0 | | p^2+8p-12=0 | | 6+8x=2(a-2x) | | 9x+1=6x+49 | | 5x+2x=4x+6 | | 7x+y=60-3x | | 36-5x=6 | | (x-8)(2x-5)= | | X+5=-2x | | -2x+3y=1 | | 7x-6x+9x= | | 7x-4=-2 | | 3x^3+4x^2+6=x | | x-5+2=1 | | -3x-9=4x-2 | | x^4+x^3=16-8x-6x^2 | | -[(3x-(2x+5))]=-4-[3(2x-4)-3x] | | 367544+6545667-64567+765-665+776-566665= | | x^2+25x+13= | | y^2+y=30 | | 4x^2+12x+9=3x^2 |

Equations solver categories