x^2+12x=-3

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


Simplifying
x2 + 12x = -3

Reorder the terms:
12x + x2 = -3

Solving
12x + x2 = -3

Solving for variable 'x'.

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

Combine like terms: -3 + 3 = 0
3 + 12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 12x + -3 + x2 = 0 + -3

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

Combine like terms: 3 + -3 = 0
0 + 12x + x2 = 0 + -3
12x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
12x + x2 = -3

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 = -3 + 36

Reorder the terms:
36 + 12x + x2 = -3 + 36

Combine like terms: -3 + 36 = 33
36 + 12x + x2 = 33

Factor a perfect square on the left side:
(x + 6)(x + 6) = 33

Calculate the square root of the right side: 5.744562647

Break this problem into two subproblems by setting 
(x + 6) equal to 5.744562647 and -5.744562647.

Subproblem 1

x + 6 = 5.744562647 Simplifying x + 6 = 5.744562647 Reorder the terms: 6 + x = 5.744562647 Solving 6 + x = 5.744562647 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 = 5.744562647 + -6 Combine like terms: 6 + -6 = 0 0 + x = 5.744562647 + -6 x = 5.744562647 + -6 Combine like terms: 5.744562647 + -6 = -0.255437353 x = -0.255437353 Simplifying x = -0.255437353

Subproblem 2

x + 6 = -5.744562647 Simplifying x + 6 = -5.744562647 Reorder the terms: 6 + x = -5.744562647 Solving 6 + x = -5.744562647 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 = -5.744562647 + -6 Combine like terms: 6 + -6 = 0 0 + x = -5.744562647 + -6 x = -5.744562647 + -6 Combine like terms: -5.744562647 + -6 = -11.744562647 x = -11.744562647 Simplifying x = -11.744562647

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.255437353, -11.744562647}

See similar equations:

| -12-11=-5v+2v | | 2(x-5)+x=3(x-6)+8 | | (x-8)(2x+1)=0 | | 2t+2t=5+18 | | 0=-3x^2+12x-7 | | =-3x^2+12x-7 | | 7x^2-24x=0 | | 11x-18x=0 | | 5y-3x=24solvefry | | -3[3x-(2x+5)]=-4-[3(2x-4)-3x] | | 30x+25=35x | | 5y-3x=24 | | 7[2-(3+4x)]-2x=-9+2(1-15x) | | 10x^3-640=0 | | 2x^3-5x^2=12x | | 3y-10=4-4y | | b^2+3b+28= | | 6v+8v=6+8v | | 5-3h=2 | | a+4b=4 | | 5-3h-2= | | 8x-4y=-4 | | 5x-3=2x-8 | | a+8b=16 | | 28n^2+4n=0 | | 28n^2+5n=0 | | 5v=.333333333333 | | 2(p+2)=1.8-2-0.2(p+5) | | 2+3p=14 | | 10+6c-20=6 | | 10+6c-20=-6 | | 4y-1=-21 |

Equations solver categories