12x-7-x^2=-64

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Solution for 12x-7-x^2=-64 equation:


Simplifying
12x + -7 + -1x2 = -64

Reorder the terms:
-7 + 12x + -1x2 = -64

Solving
-7 + 12x + -1x2 = -64

Solving for variable 'x'.

Reorder the terms:
-7 + 64 + 12x + -1x2 = -64 + 64

Combine like terms: -7 + 64 = 57
57 + 12x + -1x2 = -64 + 64

Combine like terms: -64 + 64 = 0
57 + 12x + -1x2 = 0

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

Divide each side by '-1'.
-57 + -12x + x2 = 0

Move the constant term to the right:

Add '57' to each side of the equation.
-57 + -12x + 57 + x2 = 0 + 57

Reorder the terms:
-57 + 57 + -12x + x2 = 0 + 57

Combine like terms: -57 + 57 = 0
0 + -12x + x2 = 0 + 57
-12x + x2 = 0 + 57

Combine like terms: 0 + 57 = 57
-12x + x2 = 57

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 = 57 + 36

Reorder the terms:
36 + -12x + x2 = 57 + 36

Combine like terms: 57 + 36 = 93
36 + -12x + x2 = 93

Factor a perfect square on the left side:
(x + -6)(x + -6) = 93

Calculate the square root of the right side: 9.643650761

Break this problem into two subproblems by setting 
(x + -6) equal to 9.643650761 and -9.643650761.

Subproblem 1

x + -6 = 9.643650761 Simplifying x + -6 = 9.643650761 Reorder the terms: -6 + x = 9.643650761 Solving -6 + x = 9.643650761 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 = 9.643650761 + 6 Combine like terms: -6 + 6 = 0 0 + x = 9.643650761 + 6 x = 9.643650761 + 6 Combine like terms: 9.643650761 + 6 = 15.643650761 x = 15.643650761 Simplifying x = 15.643650761

Subproblem 2

x + -6 = -9.643650761 Simplifying x + -6 = -9.643650761 Reorder the terms: -6 + x = -9.643650761 Solving -6 + x = -9.643650761 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 = -9.643650761 + 6 Combine like terms: -6 + 6 = 0 0 + x = -9.643650761 + 6 x = -9.643650761 + 6 Combine like terms: -9.643650761 + 6 = -3.643650761 x = -3.643650761 Simplifying x = -3.643650761

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.643650761, -3.643650761}

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