x^2-12x=-25

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Solution for x^2-12x=-25 equation:


Simplifying
x2 + -12x = -25

Reorder the terms:
-12x + x2 = -25

Solving
-12x + x2 = -25

Solving for variable 'x'.

Reorder the terms:
25 + -12x + x2 = -25 + 25

Combine like terms: -25 + 25 = 0
25 + -12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + -12x + -25 + x2 = 0 + -25

Reorder the terms:
25 + -25 + -12x + x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -12x + x2 = 0 + -25
-12x + x2 = 0 + -25

Combine like terms: 0 + -25 = -25
-12x + x2 = -25

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 = -25 + 36

Reorder the terms:
36 + -12x + x2 = -25 + 36

Combine like terms: -25 + 36 = 11
36 + -12x + x2 = 11

Factor a perfect square on the left side:
(x + -6)(x + -6) = 11

Calculate the square root of the right side: 3.31662479

Break this problem into two subproblems by setting 
(x + -6) equal to 3.31662479 and -3.31662479.

Subproblem 1

x + -6 = 3.31662479 Simplifying x + -6 = 3.31662479 Reorder the terms: -6 + x = 3.31662479 Solving -6 + x = 3.31662479 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 = 3.31662479 + 6 Combine like terms: -6 + 6 = 0 0 + x = 3.31662479 + 6 x = 3.31662479 + 6 Combine like terms: 3.31662479 + 6 = 9.31662479 x = 9.31662479 Simplifying x = 9.31662479

Subproblem 2

x + -6 = -3.31662479 Simplifying x + -6 = -3.31662479 Reorder the terms: -6 + x = -3.31662479 Solving -6 + x = -3.31662479 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 = -3.31662479 + 6 Combine like terms: -6 + 6 = 0 0 + x = -3.31662479 + 6 x = -3.31662479 + 6 Combine like terms: -3.31662479 + 6 = 2.68337521 x = 2.68337521 Simplifying x = 2.68337521

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.31662479, 2.68337521}

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