x^2+12x-419=0

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Solution for x^2+12x-419=0 equation:


Simplifying
x2 + 12x + -419 = 0

Reorder the terms:
-419 + 12x + x2 = 0

Solving
-419 + 12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '419' to each side of the equation.
-419 + 12x + 419 + x2 = 0 + 419

Reorder the terms:
-419 + 419 + 12x + x2 = 0 + 419

Combine like terms: -419 + 419 = 0
0 + 12x + x2 = 0 + 419
12x + x2 = 0 + 419

Combine like terms: 0 + 419 = 419
12x + x2 = 419

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 = 419 + 36

Reorder the terms:
36 + 12x + x2 = 419 + 36

Combine like terms: 419 + 36 = 455
36 + 12x + x2 = 455

Factor a perfect square on the left side:
(x + 6)(x + 6) = 455

Calculate the square root of the right side: 21.330729008

Break this problem into two subproblems by setting 
(x + 6) equal to 21.330729008 and -21.330729008.

Subproblem 1

x + 6 = 21.330729008 Simplifying x + 6 = 21.330729008 Reorder the terms: 6 + x = 21.330729008 Solving 6 + x = 21.330729008 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 = 21.330729008 + -6 Combine like terms: 6 + -6 = 0 0 + x = 21.330729008 + -6 x = 21.330729008 + -6 Combine like terms: 21.330729008 + -6 = 15.330729008 x = 15.330729008 Simplifying x = 15.330729008

Subproblem 2

x + 6 = -21.330729008 Simplifying x + 6 = -21.330729008 Reorder the terms: 6 + x = -21.330729008 Solving 6 + x = -21.330729008 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 = -21.330729008 + -6 Combine like terms: 6 + -6 = 0 0 + x = -21.330729008 + -6 x = -21.330729008 + -6 Combine like terms: -21.330729008 + -6 = -27.330729008 x = -27.330729008 Simplifying x = -27.330729008

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.330729008, -27.330729008}

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