x^2+4.5x+5.1=14.1

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Solution for x^2+4.5x+5.1=14.1 equation:


Simplifying
x2 + 4.5x + 5.1 = 14.1

Reorder the terms:
5.1 + 4.5x + x2 = 14.1

Solving
5.1 + 4.5x + x2 = 14.1

Solving for variable 'x'.

Reorder the terms:
5.1 + -14.1 + 4.5x + x2 = 14.1 + -14.1

Combine like terms: 5.1 + -14.1 = -9
-9 + 4.5x + x2 = 14.1 + -14.1

Combine like terms: 14.1 + -14.1 = 0.0
-9 + 4.5x + x2 = 0.0

Begin completing the square.

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 4.5x + 9 + x2 = 0.0 + 9

Reorder the terms:
-9 + 9 + 4.5x + x2 = 0.0 + 9

Combine like terms: -9 + 9 = 0
0 + 4.5x + x2 = 0.0 + 9
4.5x + x2 = 0.0 + 9

Combine like terms: 0.0 + 9 = 9
4.5x + x2 = 9

The x term is 4.5x.  Take half its coefficient (2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
4.5x + 5.0625 + x2 = 9 + 5.0625

Reorder the terms:
5.0625 + 4.5x + x2 = 9 + 5.0625

Combine like terms: 9 + 5.0625 = 14.0625
5.0625 + 4.5x + x2 = 14.0625

Factor a perfect square on the left side:
(x + 2.25)(x + 2.25) = 14.0625

Calculate the square root of the right side: 3.75

Break this problem into two subproblems by setting 
(x + 2.25) equal to 3.75 and -3.75.

Subproblem 1

x + 2.25 = 3.75 Simplifying x + 2.25 = 3.75 Reorder the terms: 2.25 + x = 3.75 Solving 2.25 + x = 3.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + x = 3.75 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = 3.75 + -2.25 x = 3.75 + -2.25 Combine like terms: 3.75 + -2.25 = 1.5 x = 1.5 Simplifying x = 1.5

Subproblem 2

x + 2.25 = -3.75 Simplifying x + 2.25 = -3.75 Reorder the terms: 2.25 + x = -3.75 Solving 2.25 + x = -3.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + x = -3.75 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = -3.75 + -2.25 x = -3.75 + -2.25 Combine like terms: -3.75 + -2.25 = -6 x = -6 Simplifying x = -6

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.5, -6}

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