x^2+6x-19=23

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Solution for x^2+6x-19=23 equation:


Simplifying
x2 + 6x + -19 = 23

Reorder the terms:
-19 + 6x + x2 = 23

Solving
-19 + 6x + x2 = 23

Solving for variable 'x'.

Reorder the terms:
-19 + -23 + 6x + x2 = 23 + -23

Combine like terms: -19 + -23 = -42
-42 + 6x + x2 = 23 + -23

Combine like terms: 23 + -23 = 0
-42 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '42' to each side of the equation.
-42 + 6x + 42 + x2 = 0 + 42

Reorder the terms:
-42 + 42 + 6x + x2 = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 6x + x2 = 0 + 42
6x + x2 = 0 + 42

Combine like terms: 0 + 42 = 42
6x + x2 = 42

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 = 42 + 9

Reorder the terms:
9 + 6x + x2 = 42 + 9

Combine like terms: 42 + 9 = 51
9 + 6x + x2 = 51

Factor a perfect square on the left side:
(x + 3)(x + 3) = 51

Calculate the square root of the right side: 7.141428429

Break this problem into two subproblems by setting 
(x + 3) equal to 7.141428429 and -7.141428429.

Subproblem 1

x + 3 = 7.141428429 Simplifying x + 3 = 7.141428429 Reorder the terms: 3 + x = 7.141428429 Solving 3 + x = 7.141428429 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 = 7.141428429 + -3 Combine like terms: 3 + -3 = 0 0 + x = 7.141428429 + -3 x = 7.141428429 + -3 Combine like terms: 7.141428429 + -3 = 4.141428429 x = 4.141428429 Simplifying x = 4.141428429

Subproblem 2

x + 3 = -7.141428429 Simplifying x + 3 = -7.141428429 Reorder the terms: 3 + x = -7.141428429 Solving 3 + x = -7.141428429 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 = -7.141428429 + -3 Combine like terms: 3 + -3 = 0 0 + x = -7.141428429 + -3 x = -7.141428429 + -3 Combine like terms: -7.141428429 + -3 = -10.141428429 x = -10.141428429 Simplifying x = -10.141428429

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.141428429, -10.141428429}

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