9x+x^2=144

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Solution for 9x+x^2=144 equation:


Simplifying
9x + x2 = 144

Solving
9x + x2 = 144

Solving for variable 'x'.

Reorder the terms:
-144 + 9x + x2 = 144 + -144

Combine like terms: 144 + -144 = 0
-144 + 9x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + 9x + 144 + x2 = 0 + 144

Reorder the terms:
-144 + 144 + 9x + x2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + 9x + x2 = 0 + 144
9x + x2 = 0 + 144

Combine like terms: 0 + 144 = 144
9x + x2 = 144

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 = 144 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 144 + 20.25

Combine like terms: 144 + 20.25 = 164.25
20.25 + 9x + x2 = 164.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 164.25

Calculate the square root of the right side: 12.816005618

Break this problem into two subproblems by setting 
(x + 4.5) equal to 12.816005618 and -12.816005618.

Subproblem 1

x + 4.5 = 12.816005618 Simplifying x + 4.5 = 12.816005618 Reorder the terms: 4.5 + x = 12.816005618 Solving 4.5 + x = 12.816005618 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 = 12.816005618 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 12.816005618 + -4.5 x = 12.816005618 + -4.5 Combine like terms: 12.816005618 + -4.5 = 8.316005618 x = 8.316005618 Simplifying x = 8.316005618

Subproblem 2

x + 4.5 = -12.816005618 Simplifying x + 4.5 = -12.816005618 Reorder the terms: 4.5 + x = -12.816005618 Solving 4.5 + x = -12.816005618 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 = -12.816005618 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -12.816005618 + -4.5 x = -12.816005618 + -4.5 Combine like terms: -12.816005618 + -4.5 = -17.316005618 x = -17.316005618 Simplifying x = -17.316005618

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.316005618, -17.316005618}

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