x^2+9x-60=0

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Solution for x^2+9x-60=0 equation:


Simplifying
x2 + 9x + -60 = 0

Reorder the terms:
-60 + 9x + x2 = 0

Solving
-60 + 9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + 9x + 60 + x2 = 0 + 60

Reorder the terms:
-60 + 60 + 9x + x2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + 9x + x2 = 0 + 60
9x + x2 = 0 + 60

Combine like terms: 0 + 60 = 60
9x + x2 = 60

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 = 60 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 60 + 20.25

Combine like terms: 60 + 20.25 = 80.25
20.25 + 9x + x2 = 80.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 80.25

Calculate the square root of the right side: 8.958236434

Break this problem into two subproblems by setting 
(x + 4.5) equal to 8.958236434 and -8.958236434.

Subproblem 1

x + 4.5 = 8.958236434 Simplifying x + 4.5 = 8.958236434 Reorder the terms: 4.5 + x = 8.958236434 Solving 4.5 + x = 8.958236434 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 = 8.958236434 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 8.958236434 + -4.5 x = 8.958236434 + -4.5 Combine like terms: 8.958236434 + -4.5 = 4.458236434 x = 4.458236434 Simplifying x = 4.458236434

Subproblem 2

x + 4.5 = -8.958236434 Simplifying x + 4.5 = -8.958236434 Reorder the terms: 4.5 + x = -8.958236434 Solving 4.5 + x = -8.958236434 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 = -8.958236434 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -8.958236434 + -4.5 x = -8.958236434 + -4.5 Combine like terms: -8.958236434 + -4.5 = -13.458236434 x = -13.458236434 Simplifying x = -13.458236434

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.458236434, -13.458236434}

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