x^2+9x-480=0

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Solution for x^2+9x-480=0 equation:


Simplifying
x2 + 9x + -480 = 0

Reorder the terms:
-480 + 9x + x2 = 0

Solving
-480 + 9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '480' to each side of the equation.
-480 + 9x + 480 + x2 = 0 + 480

Reorder the terms:
-480 + 480 + 9x + x2 = 0 + 480

Combine like terms: -480 + 480 = 0
0 + 9x + x2 = 0 + 480
9x + x2 = 0 + 480

Combine like terms: 0 + 480 = 480
9x + x2 = 480

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 = 480 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 480 + 20.25

Combine like terms: 480 + 20.25 = 500.25
20.25 + 9x + x2 = 500.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 500.25

Calculate the square root of the right side: 22.366269246

Break this problem into two subproblems by setting 
(x + 4.5) equal to 22.366269246 and -22.366269246.

Subproblem 1

x + 4.5 = 22.366269246 Simplifying x + 4.5 = 22.366269246 Reorder the terms: 4.5 + x = 22.366269246 Solving 4.5 + x = 22.366269246 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 = 22.366269246 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 22.366269246 + -4.5 x = 22.366269246 + -4.5 Combine like terms: 22.366269246 + -4.5 = 17.866269246 x = 17.866269246 Simplifying x = 17.866269246

Subproblem 2

x + 4.5 = -22.366269246 Simplifying x + 4.5 = -22.366269246 Reorder the terms: 4.5 + x = -22.366269246 Solving 4.5 + x = -22.366269246 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 = -22.366269246 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -22.366269246 + -4.5 x = -22.366269246 + -4.5 Combine like terms: -22.366269246 + -4.5 = -26.866269246 x = -26.866269246 Simplifying x = -26.866269246

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.866269246, -26.866269246}

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