0=-0.5x^2+36x-144

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Solution for 0=-0.5x^2+36x-144 equation:


Simplifying
0 = -0.5x2 + 36x + -144

Reorder the terms:
0 = -144 + 36x + -0.5x2

Solving
0 = -144 + 36x + -0.5x2

Solving for variable 'x'.

Combine like terms: 0 + 144 = 144
144 + -36x + 0.5x2 = -144 + 36x + -0.5x2 + 144 + -36x + 0.5x2

Reorder the terms:
144 + -36x + 0.5x2 = -144 + 144 + 36x + -36x + -0.5x2 + 0.5x2

Combine like terms: -144 + 144 = 0
144 + -36x + 0.5x2 = 0 + 36x + -36x + -0.5x2 + 0.5x2
144 + -36x + 0.5x2 = 36x + -36x + -0.5x2 + 0.5x2

Combine like terms: 36x + -36x = 0
144 + -36x + 0.5x2 = 0 + -0.5x2 + 0.5x2
144 + -36x + 0.5x2 = -0.5x2 + 0.5x2

Combine like terms: -0.5x2 + 0.5x2 = 0.0
144 + -36x + 0.5x2 = 0.0

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

Divide each side by '0.5'.
288 + -72x + x2 = 0

Move the constant term to the right:

Add '-288' to each side of the equation.
288 + -72x + -288 + x2 = 0 + -288

Reorder the terms:
288 + -288 + -72x + x2 = 0 + -288

Combine like terms: 288 + -288 = 0
0 + -72x + x2 = 0 + -288
-72x + x2 = 0 + -288

Combine like terms: 0 + -288 = -288
-72x + x2 = -288

The x term is -72x.  Take half its coefficient (-36).
Square it (1296) and add it to both sides.

Add '1296' to each side of the equation.
-72x + 1296 + x2 = -288 + 1296

Reorder the terms:
1296 + -72x + x2 = -288 + 1296

Combine like terms: -288 + 1296 = 1008
1296 + -72x + x2 = 1008

Factor a perfect square on the left side:
(x + -36)(x + -36) = 1008

Calculate the square root of the right side: 31.749015733

Break this problem into two subproblems by setting 
(x + -36) equal to 31.749015733 and -31.749015733.

Subproblem 1

x + -36 = 31.749015733 Simplifying x + -36 = 31.749015733 Reorder the terms: -36 + x = 31.749015733 Solving -36 + x = 31.749015733 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '36' to each side of the equation. -36 + 36 + x = 31.749015733 + 36 Combine like terms: -36 + 36 = 0 0 + x = 31.749015733 + 36 x = 31.749015733 + 36 Combine like terms: 31.749015733 + 36 = 67.749015733 x = 67.749015733 Simplifying x = 67.749015733

Subproblem 2

x + -36 = -31.749015733 Simplifying x + -36 = -31.749015733 Reorder the terms: -36 + x = -31.749015733 Solving -36 + x = -31.749015733 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '36' to each side of the equation. -36 + 36 + x = -31.749015733 + 36 Combine like terms: -36 + 36 = 0 0 + x = -31.749015733 + 36 x = -31.749015733 + 36 Combine like terms: -31.749015733 + 36 = 4.250984267 x = 4.250984267 Simplifying x = 4.250984267

Solution

The solution to the problem is based on the solutions from the subproblems. x = {67.749015733, 4.250984267}

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