-18x+0.5x^2=-144

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Solution for -18x+0.5x^2=-144 equation:


Simplifying
-18x + 0.5x2 = -144

Solving
-18x + 0.5x2 = -144

Solving for variable 'x'.

Reorder the terms:
144 + -18x + 0.5x2 = -144 + 144

Combine like terms: -144 + 144 = 0
144 + -18x + 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'.
288 + -36x + x2 = 0

Move the constant term to the right:

Add '-288' to each side of the equation.
288 + -36x + -288 + x2 = 0 + -288

Reorder the terms:
288 + -288 + -36x + x2 = 0 + -288

Combine like terms: 288 + -288 = 0
0 + -36x + x2 = 0 + -288
-36x + x2 = 0 + -288

Combine like terms: 0 + -288 = -288
-36x + x2 = -288

The x term is -36x.  Take half its coefficient (-18).
Square it (324) and add it to both sides.

Add '324' to each side of the equation.
-36x + 324 + x2 = -288 + 324

Reorder the terms:
324 + -36x + x2 = -288 + 324

Combine like terms: -288 + 324 = 36
324 + -36x + x2 = 36

Factor a perfect square on the left side:
(x + -18)(x + -18) = 36

Calculate the square root of the right side: 6

Break this problem into two subproblems by setting 
(x + -18) equal to 6 and -6.

Subproblem 1

x + -18 = 6 Simplifying x + -18 = 6 Reorder the terms: -18 + x = 6 Solving -18 + x = 6 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + x = 6 + 18 Combine like terms: -18 + 18 = 0 0 + x = 6 + 18 x = 6 + 18 Combine like terms: 6 + 18 = 24 x = 24 Simplifying x = 24

Subproblem 2

x + -18 = -6 Simplifying x + -18 = -6 Reorder the terms: -18 + x = -6 Solving -18 + x = -6 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + x = -6 + 18 Combine like terms: -18 + 18 = 0 0 + x = -6 + 18 x = -6 + 18 Combine like terms: -6 + 18 = 12 x = 12 Simplifying x = 12

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24, 12}

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