x^2+9x-224=0

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Solution for x^2+9x-224=0 equation:


Simplifying
x2 + 9x + -224 = 0

Reorder the terms:
-224 + 9x + x2 = 0

Solving
-224 + 9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '224' to each side of the equation.
-224 + 9x + 224 + x2 = 0 + 224

Reorder the terms:
-224 + 224 + 9x + x2 = 0 + 224

Combine like terms: -224 + 224 = 0
0 + 9x + x2 = 0 + 224
9x + x2 = 0 + 224

Combine like terms: 0 + 224 = 224
9x + x2 = 224

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 = 224 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 224 + 20.25

Combine like terms: 224 + 20.25 = 244.25
20.25 + 9x + x2 = 244.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 244.25

Calculate the square root of the right side: 15.628499608

Break this problem into two subproblems by setting 
(x + 4.5) equal to 15.628499608 and -15.628499608.

Subproblem 1

x + 4.5 = 15.628499608 Simplifying x + 4.5 = 15.628499608 Reorder the terms: 4.5 + x = 15.628499608 Solving 4.5 + x = 15.628499608 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 = 15.628499608 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 15.628499608 + -4.5 x = 15.628499608 + -4.5 Combine like terms: 15.628499608 + -4.5 = 11.128499608 x = 11.128499608 Simplifying x = 11.128499608

Subproblem 2

x + 4.5 = -15.628499608 Simplifying x + 4.5 = -15.628499608 Reorder the terms: 4.5 + x = -15.628499608 Solving 4.5 + x = -15.628499608 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 = -15.628499608 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -15.628499608 + -4.5 x = -15.628499608 + -4.5 Combine like terms: -15.628499608 + -4.5 = -20.128499608 x = -20.128499608 Simplifying x = -20.128499608

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.128499608, -20.128499608}

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