x^2+19x+12=0

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Solution for x^2+19x+12=0 equation:


Simplifying
x2 + 19x + 12 = 0

Reorder the terms:
12 + 19x + x2 = 0

Solving
12 + 19x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + 19x + -12 + x2 = 0 + -12

Reorder the terms:
12 + -12 + 19x + x2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 19x + x2 = 0 + -12
19x + x2 = 0 + -12

Combine like terms: 0 + -12 = -12
19x + x2 = -12

The x term is 19x.  Take half its coefficient (9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
19x + 90.25 + x2 = -12 + 90.25

Reorder the terms:
90.25 + 19x + x2 = -12 + 90.25

Combine like terms: -12 + 90.25 = 78.25
90.25 + 19x + x2 = 78.25

Factor a perfect square on the left side:
(x + 9.5)(x + 9.5) = 78.25

Calculate the square root of the right side: 8.845903006

Break this problem into two subproblems by setting 
(x + 9.5) equal to 8.845903006 and -8.845903006.

Subproblem 1

x + 9.5 = 8.845903006 Simplifying x + 9.5 = 8.845903006 Reorder the terms: 9.5 + x = 8.845903006 Solving 9.5 + x = 8.845903006 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.5' to each side of the equation. 9.5 + -9.5 + x = 8.845903006 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + x = 8.845903006 + -9.5 x = 8.845903006 + -9.5 Combine like terms: 8.845903006 + -9.5 = -0.654096994 x = -0.654096994 Simplifying x = -0.654096994

Subproblem 2

x + 9.5 = -8.845903006 Simplifying x + 9.5 = -8.845903006 Reorder the terms: 9.5 + x = -8.845903006 Solving 9.5 + x = -8.845903006 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.5' to each side of the equation. 9.5 + -9.5 + x = -8.845903006 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + x = -8.845903006 + -9.5 x = -8.845903006 + -9.5 Combine like terms: -8.845903006 + -9.5 = -18.345903006 x = -18.345903006 Simplifying x = -18.345903006

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.654096994, -18.345903006}

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