62=.5x^2+18x

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Solution for 62=.5x^2+18x equation:


Simplifying
62 = 0.5x2 + 18x

Reorder the terms:
62 = 18x + 0.5x2

Solving
62 = 18x + 0.5x2

Solving for variable 'x'.

Reorder the terms:
62 + -18x + -0.5x2 = 18x + -18x + 0.5x2 + -0.5x2

Combine like terms: 18x + -18x = 0
62 + -18x + -0.5x2 = 0 + 0.5x2 + -0.5x2
62 + -18x + -0.5x2 = 0.5x2 + -0.5x2

Combine like terms: 0.5x2 + -0.5x2 = 0.0
62 + -18x + -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'.
-124 + 36x + x2 = 0

Move the constant term to the right:

Add '124' to each side of the equation.
-124 + 36x + 124 + x2 = 0 + 124

Reorder the terms:
-124 + 124 + 36x + x2 = 0 + 124

Combine like terms: -124 + 124 = 0
0 + 36x + x2 = 0 + 124
36x + x2 = 0 + 124

Combine like terms: 0 + 124 = 124
36x + x2 = 124

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 = 124 + 324

Reorder the terms:
324 + 36x + x2 = 124 + 324

Combine like terms: 124 + 324 = 448
324 + 36x + x2 = 448

Factor a perfect square on the left side:
(x + 18)(x + 18) = 448

Calculate the square root of the right side: 21.166010489

Break this problem into two subproblems by setting 
(x + 18) equal to 21.166010489 and -21.166010489.

Subproblem 1

x + 18 = 21.166010489 Simplifying x + 18 = 21.166010489 Reorder the terms: 18 + x = 21.166010489 Solving 18 + x = 21.166010489 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 = 21.166010489 + -18 Combine like terms: 18 + -18 = 0 0 + x = 21.166010489 + -18 x = 21.166010489 + -18 Combine like terms: 21.166010489 + -18 = 3.166010489 x = 3.166010489 Simplifying x = 3.166010489

Subproblem 2

x + 18 = -21.166010489 Simplifying x + 18 = -21.166010489 Reorder the terms: 18 + x = -21.166010489 Solving 18 + x = -21.166010489 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 = -21.166010489 + -18 Combine like terms: 18 + -18 = 0 0 + x = -21.166010489 + -18 x = -21.166010489 + -18 Combine like terms: -21.166010489 + -18 = -39.166010489 x = -39.166010489 Simplifying x = -39.166010489

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.166010489, -39.166010489}

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