-96=-x^2+12x+128

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Solution for -96=-x^2+12x+128 equation:


Simplifying
-96 = -1x2 + 12x + 128

Reorder the terms:
-96 = 128 + 12x + -1x2

Solving
-96 = 128 + 12x + -1x2

Solving for variable 'x'.

Combine like terms: -96 + -128 = -224
-224 + -12x + x2 = 128 + 12x + -1x2 + -128 + -12x + x2

Reorder the terms:
-224 + -12x + x2 = 128 + -128 + 12x + -12x + -1x2 + x2

Combine like terms: 128 + -128 = 0
-224 + -12x + x2 = 0 + 12x + -12x + -1x2 + x2
-224 + -12x + x2 = 12x + -12x + -1x2 + x2

Combine like terms: 12x + -12x = 0
-224 + -12x + x2 = 0 + -1x2 + x2
-224 + -12x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-224 + -12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '224' to each side of the equation.
-224 + -12x + 224 + x2 = 0 + 224

Reorder the terms:
-224 + 224 + -12x + x2 = 0 + 224

Combine like terms: -224 + 224 = 0
0 + -12x + x2 = 0 + 224
-12x + x2 = 0 + 224

Combine like terms: 0 + 224 = 224
-12x + x2 = 224

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 = 224 + 36

Reorder the terms:
36 + -12x + x2 = 224 + 36

Combine like terms: 224 + 36 = 260
36 + -12x + x2 = 260

Factor a perfect square on the left side:
(x + -6)(x + -6) = 260

Calculate the square root of the right side: 16.124515497

Break this problem into two subproblems by setting 
(x + -6) equal to 16.124515497 and -16.124515497.

Subproblem 1

x + -6 = 16.124515497 Simplifying x + -6 = 16.124515497 Reorder the terms: -6 + x = 16.124515497 Solving -6 + x = 16.124515497 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 = 16.124515497 + 6 Combine like terms: -6 + 6 = 0 0 + x = 16.124515497 + 6 x = 16.124515497 + 6 Combine like terms: 16.124515497 + 6 = 22.124515497 x = 22.124515497 Simplifying x = 22.124515497

Subproblem 2

x + -6 = -16.124515497 Simplifying x + -6 = -16.124515497 Reorder the terms: -6 + x = -16.124515497 Solving -6 + x = -16.124515497 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 = -16.124515497 + 6 Combine like terms: -6 + 6 = 0 0 + x = -16.124515497 + 6 x = -16.124515497 + 6 Combine like terms: -16.124515497 + 6 = -10.124515497 x = -10.124515497 Simplifying x = -10.124515497

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.124515497, -10.124515497}

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