-0.5x^2+16x-12=100

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Solution for -0.5x^2+16x-12=100 equation:


Simplifying
-0.5x2 + 16x + -12 = 100

Reorder the terms:
-12 + 16x + -0.5x2 = 100

Solving
-12 + 16x + -0.5x2 = 100

Solving for variable 'x'.

Reorder the terms:
-12 + -100 + 16x + -0.5x2 = 100 + -100

Combine like terms: -12 + -100 = -112
-112 + 16x + -0.5x2 = 100 + -100

Combine like terms: 100 + -100 = 0
-112 + 16x + -0.5x2 = 0

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
224 + -32x + x2 = 0

Move the constant term to the right:

Add '-224' to each side of the equation.
224 + -32x + -224 + x2 = 0 + -224

Reorder the terms:
224 + -224 + -32x + x2 = 0 + -224

Combine like terms: 224 + -224 = 0
0 + -32x + x2 = 0 + -224
-32x + x2 = 0 + -224

Combine like terms: 0 + -224 = -224
-32x + x2 = -224

The x term is -32x.  Take half its coefficient (-16).
Square it (256) and add it to both sides.

Add '256' to each side of the equation.
-32x + 256 + x2 = -224 + 256

Reorder the terms:
256 + -32x + x2 = -224 + 256

Combine like terms: -224 + 256 = 32
256 + -32x + x2 = 32

Factor a perfect square on the left side:
(x + -16)(x + -16) = 32

Calculate the square root of the right side: 5.656854249

Break this problem into two subproblems by setting 
(x + -16) equal to 5.656854249 and -5.656854249.

Subproblem 1

x + -16 = 5.656854249 Simplifying x + -16 = 5.656854249 Reorder the terms: -16 + x = 5.656854249 Solving -16 + x = 5.656854249 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + x = 5.656854249 + 16 Combine like terms: -16 + 16 = 0 0 + x = 5.656854249 + 16 x = 5.656854249 + 16 Combine like terms: 5.656854249 + 16 = 21.656854249 x = 21.656854249 Simplifying x = 21.656854249

Subproblem 2

x + -16 = -5.656854249 Simplifying x + -16 = -5.656854249 Reorder the terms: -16 + x = -5.656854249 Solving -16 + x = -5.656854249 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + x = -5.656854249 + 16 Combine like terms: -16 + 16 = 0 0 + x = -5.656854249 + 16 x = -5.656854249 + 16 Combine like terms: -5.656854249 + 16 = 10.343145751 x = 10.343145751 Simplifying x = 10.343145751

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.656854249, 10.343145751}

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