0=x^2+36x-462

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Solution for 0=x^2+36x-462 equation:


Simplifying
0 = x2 + 36x + -462

Reorder the terms:
0 = -462 + 36x + x2

Solving
0 = -462 + 36x + x2

Solving for variable 'x'.

Combine like terms: 0 + 462 = 462
462 + -36x + -1x2 = -462 + 36x + x2 + 462 + -36x + -1x2

Reorder the terms:
462 + -36x + -1x2 = -462 + 462 + 36x + -36x + x2 + -1x2

Combine like terms: -462 + 462 = 0
462 + -36x + -1x2 = 0 + 36x + -36x + x2 + -1x2
462 + -36x + -1x2 = 36x + -36x + x2 + -1x2

Combine like terms: 36x + -36x = 0
462 + -36x + -1x2 = 0 + x2 + -1x2
462 + -36x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
462 + -36x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-462 + 36x + x2 = 0

Move the constant term to the right:

Add '462' to each side of the equation.
-462 + 36x + 462 + x2 = 0 + 462

Reorder the terms:
-462 + 462 + 36x + x2 = 0 + 462

Combine like terms: -462 + 462 = 0
0 + 36x + x2 = 0 + 462
36x + x2 = 0 + 462

Combine like terms: 0 + 462 = 462
36x + x2 = 462

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 = 462 + 324

Reorder the terms:
324 + 36x + x2 = 462 + 324

Combine like terms: 462 + 324 = 786
324 + 36x + x2 = 786

Factor a perfect square on the left side:
(x + 18)(x + 18) = 786

Calculate the square root of the right side: 28.035691538

Break this problem into two subproblems by setting 
(x + 18) equal to 28.035691538 and -28.035691538.

Subproblem 1

x + 18 = 28.035691538 Simplifying x + 18 = 28.035691538 Reorder the terms: 18 + x = 28.035691538 Solving 18 + x = 28.035691538 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 = 28.035691538 + -18 Combine like terms: 18 + -18 = 0 0 + x = 28.035691538 + -18 x = 28.035691538 + -18 Combine like terms: 28.035691538 + -18 = 10.035691538 x = 10.035691538 Simplifying x = 10.035691538

Subproblem 2

x + 18 = -28.035691538 Simplifying x + 18 = -28.035691538 Reorder the terms: 18 + x = -28.035691538 Solving 18 + x = -28.035691538 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 = -28.035691538 + -18 Combine like terms: 18 + -18 = 0 0 + x = -28.035691538 + -18 x = -28.035691538 + -18 Combine like terms: -28.035691538 + -18 = -46.035691538 x = -46.035691538 Simplifying x = -46.035691538

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.035691538, -46.035691538}

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