x^2-12x-340=0

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Solution for x^2-12x-340=0 equation:


Simplifying
x2 + -12x + -340 = 0

Reorder the terms:
-340 + -12x + x2 = 0

Solving
-340 + -12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '340' to each side of the equation.
-340 + -12x + 340 + x2 = 0 + 340

Reorder the terms:
-340 + 340 + -12x + x2 = 0 + 340

Combine like terms: -340 + 340 = 0
0 + -12x + x2 = 0 + 340
-12x + x2 = 0 + 340

Combine like terms: 0 + 340 = 340
-12x + x2 = 340

The x term is -12x.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12x + 36 + x2 = 340 + 36

Reorder the terms:
36 + -12x + x2 = 340 + 36

Combine like terms: 340 + 36 = 376
36 + -12x + x2 = 376

Factor a perfect square on the left side:
(x + -6)(x + -6) = 376

Calculate the square root of the right side: 19.39071943

Break this problem into two subproblems by setting 
(x + -6) equal to 19.39071943 and -19.39071943.

Subproblem 1

x + -6 = 19.39071943 Simplifying x + -6 = 19.39071943 Reorder the terms: -6 + x = 19.39071943 Solving -6 + x = 19.39071943 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 19.39071943 + 6 Combine like terms: -6 + 6 = 0 0 + x = 19.39071943 + 6 x = 19.39071943 + 6 Combine like terms: 19.39071943 + 6 = 25.39071943 x = 25.39071943 Simplifying x = 25.39071943

Subproblem 2

x + -6 = -19.39071943 Simplifying x + -6 = -19.39071943 Reorder the terms: -6 + x = -19.39071943 Solving -6 + x = -19.39071943 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -19.39071943 + 6 Combine like terms: -6 + 6 = 0 0 + x = -19.39071943 + 6 x = -19.39071943 + 6 Combine like terms: -19.39071943 + 6 = -13.39071943 x = -13.39071943 Simplifying x = -13.39071943

Solution

The solution to the problem is based on the solutions from the subproblems. x = {25.39071943, -13.39071943}

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