x^2-2*x=12

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


Simplifying
x2 + -2x = 12

Reorder the terms:
-2x + x2 = 12

Solving
-2x + x2 = 12

Solving for variable 'x'.

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

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

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 = 4.605551275 x = 4.605551275 Simplifying x = 4.605551275

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 = -2.605551275 x = -2.605551275 Simplifying x = -2.605551275

Solution

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

See similar equations:

| 14y+7y-21y=9+8-17 | | x-8+7x+5+8-2x-5x=0 | | x-8+7x=0 | | P/3-5=2 | | 1/2x-22=-20 | | 6*x^2-12*x-90=-18 | | x(x+-8)=-41 | | 10.25=1/r | | (2,5)(1,7)= | | -8.9y=-660.38 | | m^3-6m^2+2m-8=0 | | 8.5y+5.26=-78.04 | | tan(3x+30)=cot(x-4) | | (x^2-4x+5)(y^2-6y+10)=1 | | h=16t^2+p | | 275=25-v | | 8v+7(v+2)=89 | | 42=9y-3y | | 10=4v+v | | x^1/6×x^1/3 | | 7w-w=30 | | 3.6t-8.2=24.92 | | 7x-2yi=7+10i | | (-5)+6-4-(-2)= | | 7(5a-6)-1=-218 | | x^2-3x+9=47 | | ln(2x^9/y^8) | | 2x-4(2-3x)=4(x-5)-18 | | 16x+48=4x+72 | | -5.82=3.43z-5.82 | | 6x-3yi=6+15i | | (D^2-4)y=2-8x |

Equations solver categories