x^2+6x=324

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Solution for x^2+6x=324 equation:


Simplifying
x2 + 6x = 324

Reorder the terms:
6x + x2 = 324

Solving
6x + x2 = 324

Solving for variable 'x'.

Reorder the terms:
-324 + 6x + x2 = 324 + -324

Combine like terms: 324 + -324 = 0
-324 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '324' to each side of the equation.
-324 + 6x + 324 + x2 = 0 + 324

Reorder the terms:
-324 + 324 + 6x + x2 = 0 + 324

Combine like terms: -324 + 324 = 0
0 + 6x + x2 = 0 + 324
6x + x2 = 0 + 324

Combine like terms: 0 + 324 = 324
6x + x2 = 324

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 324 + 9

Reorder the terms:
9 + 6x + x2 = 324 + 9

Combine like terms: 324 + 9 = 333
9 + 6x + x2 = 333

Factor a perfect square on the left side:
(x + 3)(x + 3) = 333

Calculate the square root of the right side: 18.248287591

Break this problem into two subproblems by setting 
(x + 3) equal to 18.248287591 and -18.248287591.

Subproblem 1

x + 3 = 18.248287591 Simplifying x + 3 = 18.248287591 Reorder the terms: 3 + x = 18.248287591 Solving 3 + x = 18.248287591 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 18.248287591 + -3 Combine like terms: 3 + -3 = 0 0 + x = 18.248287591 + -3 x = 18.248287591 + -3 Combine like terms: 18.248287591 + -3 = 15.248287591 x = 15.248287591 Simplifying x = 15.248287591

Subproblem 2

x + 3 = -18.248287591 Simplifying x + 3 = -18.248287591 Reorder the terms: 3 + x = -18.248287591 Solving 3 + x = -18.248287591 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -18.248287591 + -3 Combine like terms: 3 + -3 = 0 0 + x = -18.248287591 + -3 x = -18.248287591 + -3 Combine like terms: -18.248287591 + -3 = -21.248287591 x = -21.248287591 Simplifying x = -21.248287591

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.248287591, -21.248287591}

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