(x^2+12)-(9x-135)=622

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Solution for (x^2+12)-(9x-135)=622 equation:


Simplifying
(x2 + 12) + -1(9x + -135) = 622

Reorder the terms:
(12 + x2) + -1(9x + -135) = 622

Remove parenthesis around (12 + x2)
12 + x2 + -1(9x + -135) = 622

Reorder the terms:
12 + x2 + -1(-135 + 9x) = 622
12 + x2 + (-135 * -1 + 9x * -1) = 622
12 + x2 + (135 + -9x) = 622

Reorder the terms:
12 + 135 + -9x + x2 = 622

Combine like terms: 12 + 135 = 147
147 + -9x + x2 = 622

Solving
147 + -9x + x2 = 622

Solving for variable 'x'.

Reorder the terms:
147 + -622 + -9x + x2 = 622 + -622

Combine like terms: 147 + -622 = -475
-475 + -9x + x2 = 622 + -622

Combine like terms: 622 + -622 = 0
-475 + -9x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '475' to each side of the equation.
-475 + -9x + 475 + x2 = 0 + 475

Reorder the terms:
-475 + 475 + -9x + x2 = 0 + 475

Combine like terms: -475 + 475 = 0
0 + -9x + x2 = 0 + 475
-9x + x2 = 0 + 475

Combine like terms: 0 + 475 = 475
-9x + x2 = 475

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = 475 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 475 + 20.25

Combine like terms: 475 + 20.25 = 495.25
20.25 + -9x + x2 = 495.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 495.25

Calculate the square root of the right side: 22.254213084

Break this problem into two subproblems by setting 
(x + -4.5) equal to 22.254213084 and -22.254213084.

Subproblem 1

x + -4.5 = 22.254213084 Simplifying x + -4.5 = 22.254213084 Reorder the terms: -4.5 + x = 22.254213084 Solving -4.5 + x = 22.254213084 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 22.254213084 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 22.254213084 + 4.5 x = 22.254213084 + 4.5 Combine like terms: 22.254213084 + 4.5 = 26.754213084 x = 26.754213084 Simplifying x = 26.754213084

Subproblem 2

x + -4.5 = -22.254213084 Simplifying x + -4.5 = -22.254213084 Reorder the terms: -4.5 + x = -22.254213084 Solving -4.5 + x = -22.254213084 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -22.254213084 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -22.254213084 + 4.5 x = -22.254213084 + 4.5 Combine like terms: -22.254213084 + 4.5 = -17.754213084 x = -17.754213084 Simplifying x = -17.754213084

Solution

The solution to the problem is based on the solutions from the subproblems. x = {26.754213084, -17.754213084}

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