x^2-12x=27

Simple and best practice solution for x^2-12x=27 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=27 equation:


Simplifying
x2 + -12x = 27

Reorder the terms:
-12x + x2 = 27

Solving
-12x + x2 = 27

Solving for variable 'x'.

Reorder the terms:
-27 + -12x + x2 = 27 + -27

Combine like terms: 27 + -27 = 0
-27 + -12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -12x + 27 + x2 = 0 + 27

Reorder the terms:
-27 + 27 + -12x + x2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -12x + x2 = 0 + 27
-12x + x2 = 0 + 27

Combine like terms: 0 + 27 = 27
-12x + x2 = 27

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 = 27 + 36

Reorder the terms:
36 + -12x + x2 = 27 + 36

Combine like terms: 27 + 36 = 63
36 + -12x + x2 = 63

Factor a perfect square on the left side:
(x + -6)(x + -6) = 63

Calculate the square root of the right side: 7.937253933

Break this problem into two subproblems by setting 
(x + -6) equal to 7.937253933 and -7.937253933.

Subproblem 1

x + -6 = 7.937253933 Simplifying x + -6 = 7.937253933 Reorder the terms: -6 + x = 7.937253933 Solving -6 + x = 7.937253933 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 = 7.937253933 + 6 Combine like terms: -6 + 6 = 0 0 + x = 7.937253933 + 6 x = 7.937253933 + 6 Combine like terms: 7.937253933 + 6 = 13.937253933 x = 13.937253933 Simplifying x = 13.937253933

Subproblem 2

x + -6 = -7.937253933 Simplifying x + -6 = -7.937253933 Reorder the terms: -6 + x = -7.937253933 Solving -6 + x = -7.937253933 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 = -7.937253933 + 6 Combine like terms: -6 + 6 = 0 0 + x = -7.937253933 + 6 x = -7.937253933 + 6 Combine like terms: -7.937253933 + 6 = -1.937253933 x = -1.937253933 Simplifying x = -1.937253933

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.937253933, -1.937253933}

See similar equations:

| 17-3x=2x+7 | | 3a+m=19 | | 3x+8i=12-(12y)i | | 3(5+5x)= | | e^6x+7e^4x+2e^2x-3=0 | | 2x+3x=-6 | | 4(3r-8)= | | 5(n+6)= | | -5(7a-6)= | | -7(5k-4)= | | 2x-8y=8 | | 5y^2-2y-3=0 | | 5(2n+6)=96 | | 2t^2-13t+6=0 | | 2*(3x-1.1)=0.8 | | 8(1-5x)= | | -7x-3y=-6 | | 5x^2=143 | | (1+2v)5= | | -16x+2y=-54 | | 2+4x=22 | | -5(10x+1)= | | 18x=29 | | -16x-18y=58 | | 4-2=8 | | 18x-29=0 | | -3(x-5)= | | 100*5= | | 5+2=2 | | 10x-41=89 | | -6(7+x)= | | 4x+12y=60 |

Equations solver categories