-x^2+12x-7=0

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Solution for -x^2+12x-7=0 equation:


Simplifying
-1x2 + 12x + -7 = 0

Reorder the terms:
-7 + 12x + -1x2 = 0

Solving
-7 + 12x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
7 + -12x + x2 = 0

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -12x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + -12x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -12x + x2 = 0 + -7
-12x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-12x + x2 = -7

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 = -7 + 36

Reorder the terms:
36 + -12x + x2 = -7 + 36

Combine like terms: -7 + 36 = 29
36 + -12x + x2 = 29

Factor a perfect square on the left side:
(x + -6)(x + -6) = 29

Calculate the square root of the right side: 5.385164807

Break this problem into two subproblems by setting 
(x + -6) equal to 5.385164807 and -5.385164807.

Subproblem 1

x + -6 = 5.385164807 Simplifying x + -6 = 5.385164807 Reorder the terms: -6 + x = 5.385164807 Solving -6 + x = 5.385164807 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 = 5.385164807 + 6 Combine like terms: -6 + 6 = 0 0 + x = 5.385164807 + 6 x = 5.385164807 + 6 Combine like terms: 5.385164807 + 6 = 11.385164807 x = 11.385164807 Simplifying x = 11.385164807

Subproblem 2

x + -6 = -5.385164807 Simplifying x + -6 = -5.385164807 Reorder the terms: -6 + x = -5.385164807 Solving -6 + x = -5.385164807 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 = -5.385164807 + 6 Combine like terms: -6 + 6 = 0 0 + x = -5.385164807 + 6 x = -5.385164807 + 6 Combine like terms: -5.385164807 + 6 = 0.614835193 x = 0.614835193 Simplifying x = 0.614835193

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.385164807, 0.614835193}

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