x^2+6x-306=0

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Solution for x^2+6x-306=0 equation:


Simplifying
x2 + 6x + -306 = 0

Reorder the terms:
-306 + 6x + x2 = 0

Solving
-306 + 6x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '306' to each side of the equation.
-306 + 6x + 306 + x2 = 0 + 306

Reorder the terms:
-306 + 306 + 6x + x2 = 0 + 306

Combine like terms: -306 + 306 = 0
0 + 6x + x2 = 0 + 306
6x + x2 = 0 + 306

Combine like terms: 0 + 306 = 306
6x + x2 = 306

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 = 306 + 9

Reorder the terms:
9 + 6x + x2 = 306 + 9

Combine like terms: 306 + 9 = 315
9 + 6x + x2 = 315

Factor a perfect square on the left side:
(x + 3)(x + 3) = 315

Calculate the square root of the right side: 17.748239349

Break this problem into two subproblems by setting 
(x + 3) equal to 17.748239349 and -17.748239349.

Subproblem 1

x + 3 = 17.748239349 Simplifying x + 3 = 17.748239349 Reorder the terms: 3 + x = 17.748239349 Solving 3 + x = 17.748239349 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 = 17.748239349 + -3 Combine like terms: 3 + -3 = 0 0 + x = 17.748239349 + -3 x = 17.748239349 + -3 Combine like terms: 17.748239349 + -3 = 14.748239349 x = 14.748239349 Simplifying x = 14.748239349

Subproblem 2

x + 3 = -17.748239349 Simplifying x + 3 = -17.748239349 Reorder the terms: 3 + x = -17.748239349 Solving 3 + x = -17.748239349 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 = -17.748239349 + -3 Combine like terms: 3 + -3 = 0 0 + x = -17.748239349 + -3 x = -17.748239349 + -3 Combine like terms: -17.748239349 + -3 = -20.748239349 x = -20.748239349 Simplifying x = -20.748239349

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.748239349, -20.748239349}

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