2x-1=13-x^2-4x

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Solution for 2x-1=13-x^2-4x equation:


Simplifying
2x + -1 = 13 + -1x2 + -4x

Reorder the terms:
-1 + 2x = 13 + -1x2 + -4x

Reorder the terms:
-1 + 2x = 13 + -4x + -1x2

Solving
-1 + 2x = 13 + -4x + -1x2

Solving for variable 'x'.

Reorder the terms:
-1 + -13 + 2x + 4x + x2 = 13 + -4x + -1x2 + -13 + 4x + x2

Combine like terms: -1 + -13 = -14
-14 + 2x + 4x + x2 = 13 + -4x + -1x2 + -13 + 4x + x2

Combine like terms: 2x + 4x = 6x
-14 + 6x + x2 = 13 + -4x + -1x2 + -13 + 4x + x2

Reorder the terms:
-14 + 6x + x2 = 13 + -13 + -4x + 4x + -1x2 + x2

Combine like terms: 13 + -13 = 0
-14 + 6x + x2 = 0 + -4x + 4x + -1x2 + x2
-14 + 6x + x2 = -4x + 4x + -1x2 + x2

Combine like terms: -4x + 4x = 0
-14 + 6x + x2 = 0 + -1x2 + x2
-14 + 6x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-14 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 6x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + 6x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 6x + x2 = 0 + 14
6x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
6x + x2 = 14

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 = 14 + 9

Reorder the terms:
9 + 6x + x2 = 14 + 9

Combine like terms: 14 + 9 = 23
9 + 6x + x2 = 23

Factor a perfect square on the left side:
(x + 3)(x + 3) = 23

Calculate the square root of the right side: 4.795831523

Break this problem into two subproblems by setting 
(x + 3) equal to 4.795831523 and -4.795831523.

Subproblem 1

x + 3 = 4.795831523 Simplifying x + 3 = 4.795831523 Reorder the terms: 3 + x = 4.795831523 Solving 3 + x = 4.795831523 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 = 4.795831523 + -3 Combine like terms: 3 + -3 = 0 0 + x = 4.795831523 + -3 x = 4.795831523 + -3 Combine like terms: 4.795831523 + -3 = 1.795831523 x = 1.795831523 Simplifying x = 1.795831523

Subproblem 2

x + 3 = -4.795831523 Simplifying x + 3 = -4.795831523 Reorder the terms: 3 + x = -4.795831523 Solving 3 + x = -4.795831523 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 = -4.795831523 + -3 Combine like terms: 3 + -3 = 0 0 + x = -4.795831523 + -3 x = -4.795831523 + -3 Combine like terms: -4.795831523 + -3 = -7.795831523 x = -7.795831523 Simplifying x = -7.795831523

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.795831523, -7.795831523}

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