.5x^2-11x-36=0

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Solution for .5x^2-11x-36=0 equation:


Simplifying
0.5x2 + -11x + -36 = 0

Reorder the terms:
-36 + -11x + 0.5x2 = 0

Solving
-36 + -11x + 0.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.5'.
-72 + -22x + x2 = 0

Move the constant term to the right:

Add '72' to each side of the equation.
-72 + -22x + 72 + x2 = 0 + 72

Reorder the terms:
-72 + 72 + -22x + x2 = 0 + 72

Combine like terms: -72 + 72 = 0
0 + -22x + x2 = 0 + 72
-22x + x2 = 0 + 72

Combine like terms: 0 + 72 = 72
-22x + x2 = 72

The x term is -22x.  Take half its coefficient (-11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
-22x + 121 + x2 = 72 + 121

Reorder the terms:
121 + -22x + x2 = 72 + 121

Combine like terms: 72 + 121 = 193
121 + -22x + x2 = 193

Factor a perfect square on the left side:
(x + -11)(x + -11) = 193

Calculate the square root of the right side: 13.892443989

Break this problem into two subproblems by setting 
(x + -11) equal to 13.892443989 and -13.892443989.

Subproblem 1

x + -11 = 13.892443989 Simplifying x + -11 = 13.892443989 Reorder the terms: -11 + x = 13.892443989 Solving -11 + x = 13.892443989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = 13.892443989 + 11 Combine like terms: -11 + 11 = 0 0 + x = 13.892443989 + 11 x = 13.892443989 + 11 Combine like terms: 13.892443989 + 11 = 24.892443989 x = 24.892443989 Simplifying x = 24.892443989

Subproblem 2

x + -11 = -13.892443989 Simplifying x + -11 = -13.892443989 Reorder the terms: -11 + x = -13.892443989 Solving -11 + x = -13.892443989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = -13.892443989 + 11 Combine like terms: -11 + 11 = 0 0 + x = -13.892443989 + 11 x = -13.892443989 + 11 Combine like terms: -13.892443989 + 11 = -2.892443989 x = -2.892443989 Simplifying x = -2.892443989

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.892443989, -2.892443989}

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