x^2+12x+8=

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


Simplifying
x2 + 12x + 8 = 0

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

Solving
8 + 12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + 12x + -8 + x2 = 0 + -8

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

Combine like terms: 8 + -8 = 0
0 + 12x + x2 = 0 + -8
12x + x2 = 0 + -8

Combine like terms: 0 + -8 = -8
12x + x2 = -8

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 = -8 + 36

Reorder the terms:
36 + 12x + x2 = -8 + 36

Combine like terms: -8 + 36 = 28
36 + 12x + x2 = 28

Factor a perfect square on the left side:
(x + 6)(x + 6) = 28

Calculate the square root of the right side: 5.291502622

Break this problem into two subproblems by setting 
(x + 6) equal to 5.291502622 and -5.291502622.

Subproblem 1

x + 6 = 5.291502622 Simplifying x + 6 = 5.291502622 Reorder the terms: 6 + x = 5.291502622 Solving 6 + x = 5.291502622 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 = 5.291502622 + -6 Combine like terms: 6 + -6 = 0 0 + x = 5.291502622 + -6 x = 5.291502622 + -6 Combine like terms: 5.291502622 + -6 = -0.708497378 x = -0.708497378 Simplifying x = -0.708497378

Subproblem 2

x + 6 = -5.291502622 Simplifying x + 6 = -5.291502622 Reorder the terms: 6 + x = -5.291502622 Solving 6 + x = -5.291502622 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 = -5.291502622 + -6 Combine like terms: 6 + -6 = 0 0 + x = -5.291502622 + -6 x = -5.291502622 + -6 Combine like terms: -5.291502622 + -6 = -11.291502622 x = -11.291502622 Simplifying x = -11.291502622

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.708497378, -11.291502622}

See similar equations:

| -10(s+5)=115 | | 5/6+1/8= | | y=(4x+48)+7x | | -8x(8x-2)=3x+16 | | 34=100t-16t^2 | | 4n-12=84 | | x^2+4x+11= | | 4x(x+2)=4x+8 | | (X+5)+(2x+5)=70 | | 2(x+1)=5[x-(3-x)] | | 2x+x=287.35 | | -3y^2-x^2+2xy-1=0 | | 12=7+15 | | 0=20-5t-5t^2 | | 4+6x-3-2x=5 | | 20=7+30t-16t^2 | | 3x^2-2xy-y^2+1=0 | | 2n^2-16+32= | | 2(3s+10)=74 | | 4x+8=8x-68 | | 8(2e+3)=40 | | 2400=(x*.76)+(y*.4) | | 4+3x=7+2x-3 | | X-11x=-28 | | 10x^2+27+5=0 | | (8x-5)+(-2x+7)= | | x=e^5y | | 014x+0.9(x-2)=0.01(4x-2) | | 24*.75x=18x | | Log(6x+4)=2 | | 5(a-10)=45 | | 16=103a |

Equations solver categories