x^2+2x-12=0

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


Simplifying
x2 + 2x + -12 = 0

Reorder the terms:
-12 + 2x + x2 = 0

Solving
-12 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + 2x + 12 + x2 = 0 + 12

Reorder the terms:
-12 + 12 + 2x + x2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 2x + x2 = 0 + 12
2x + x2 = 0 + 12

Combine like terms: 0 + 12 = 12
2x + x2 = 12

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 12 + 1

Reorder the terms:
1 + 2x + x2 = 12 + 1

Combine like terms: 12 + 1 = 13
1 + 2x + x2 = 13

Factor a perfect square on the left side:
(x + 1)(x + 1) = 13

Calculate the square root of the right side: 3.605551275

Break this problem into two subproblems by setting 
(x + 1) equal to 3.605551275 and -3.605551275.

Subproblem 1

x + 1 = 3.605551275 Simplifying x + 1 = 3.605551275 Reorder the terms: 1 + x = 3.605551275 Solving 1 + x = 3.605551275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 3.605551275 + -1 Combine like terms: 1 + -1 = 0 0 + x = 3.605551275 + -1 x = 3.605551275 + -1 Combine like terms: 3.605551275 + -1 = 2.605551275 x = 2.605551275 Simplifying x = 2.605551275

Subproblem 2

x + 1 = -3.605551275 Simplifying x + 1 = -3.605551275 Reorder the terms: 1 + x = -3.605551275 Solving 1 + x = -3.605551275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -3.605551275 + -1 Combine like terms: 1 + -1 = 0 0 + x = -3.605551275 + -1 x = -3.605551275 + -1 Combine like terms: -3.605551275 + -1 = -4.605551275 x = -4.605551275 Simplifying x = -4.605551275

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.605551275, -4.605551275}

See similar equations:

| y-(6-y)=8(y+4) | | p=7q-5600 | | x-4+9=8 | | .02g=(.05)(4.2) | | 5x-7=4(x-8)-6 | | (1.5)(10)=f-13+7 | | 15+4-s=(-3)(-2) | | 3=5+3 | | 6x+12-5x=14 | | (-1)(-4)(5)=20d | | (-1)(-4)(5)=20 | | 11x+5=10x-1 | | 0.4h=1.6 | | 7(x-12)-9=28x-240 | | -12=q-3 | | 35-b=19 | | 15j=30 | | 7(x-9)-9=32x-372 | | x^2+x+8=10 | | 5r=-45 | | n+13=24 | | 15x-41=100 | | 3x-12=12+x | | x^2-x-37=3x-5 | | 5x+7=6x+7 | | 4x^2-15x+45=9x+10 | | 16x-1=12x+3 | | 6x^2+23x-35=0 | | 4x+7=5x+6 | | 10-9x=78-37x | | 2x+11=14-x | | 4+9x-3x^2=2-x |

Equations solver categories