45=5x+x^2+6

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Solution for 45=5x+x^2+6 equation:


Simplifying
45 = 5x + x2 + 6

Reorder the terms:
45 = 6 + 5x + x2

Solving
45 = 6 + 5x + x2

Solving for variable 'x'.

Combine like terms: 45 + -6 = 39
39 + -5x + -1x2 = 6 + 5x + x2 + -6 + -5x + -1x2

Reorder the terms:
39 + -5x + -1x2 = 6 + -6 + 5x + -5x + x2 + -1x2

Combine like terms: 6 + -6 = 0
39 + -5x + -1x2 = 0 + 5x + -5x + x2 + -1x2
39 + -5x + -1x2 = 5x + -5x + x2 + -1x2

Combine like terms: 5x + -5x = 0
39 + -5x + -1x2 = 0 + x2 + -1x2
39 + -5x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
39 + -5x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-39 + 5x + x2 = 0

Move the constant term to the right:

Add '39' to each side of the equation.
-39 + 5x + 39 + x2 = 0 + 39

Reorder the terms:
-39 + 39 + 5x + x2 = 0 + 39

Combine like terms: -39 + 39 = 0
0 + 5x + x2 = 0 + 39
5x + x2 = 0 + 39

Combine like terms: 0 + 39 = 39
5x + x2 = 39

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 39 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 39 + 6.25

Combine like terms: 39 + 6.25 = 45.25
6.25 + 5x + x2 = 45.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 45.25

Calculate the square root of the right side: 6.726812024

Break this problem into two subproblems by setting 
(x + 2.5) equal to 6.726812024 and -6.726812024.

Subproblem 1

x + 2.5 = 6.726812024 Simplifying x + 2.5 = 6.726812024 Reorder the terms: 2.5 + x = 6.726812024 Solving 2.5 + x = 6.726812024 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 6.726812024 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 6.726812024 + -2.5 x = 6.726812024 + -2.5 Combine like terms: 6.726812024 + -2.5 = 4.226812024 x = 4.226812024 Simplifying x = 4.226812024

Subproblem 2

x + 2.5 = -6.726812024 Simplifying x + 2.5 = -6.726812024 Reorder the terms: 2.5 + x = -6.726812024 Solving 2.5 + x = -6.726812024 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -6.726812024 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -6.726812024 + -2.5 x = -6.726812024 + -2.5 Combine like terms: -6.726812024 + -2.5 = -9.226812024 x = -9.226812024 Simplifying x = -9.226812024

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.226812024, -9.226812024}

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