9x^2+90x+223=0

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Solution for 9x^2+90x+223=0 equation:


Simplifying
9x2 + 90x + 223 = 0

Reorder the terms:
223 + 90x + 9x2 = 0

Solving
223 + 90x + 9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
24.77777778 + 10x + x2 = 0

Move the constant term to the right:

Add '-24.77777778' to each side of the equation.
24.77777778 + 10x + -24.77777778 + x2 = 0 + -24.77777778

Reorder the terms:
24.77777778 + -24.77777778 + 10x + x2 = 0 + -24.77777778

Combine like terms: 24.77777778 + -24.77777778 = 0.00000000
0.00000000 + 10x + x2 = 0 + -24.77777778
10x + x2 = 0 + -24.77777778

Combine like terms: 0 + -24.77777778 = -24.77777778
10x + x2 = -24.77777778

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = -24.77777778 + 25

Reorder the terms:
25 + 10x + x2 = -24.77777778 + 25

Combine like terms: -24.77777778 + 25 = 0.22222222
25 + 10x + x2 = 0.22222222

Factor a perfect square on the left side:
(x + 5)(x + 5) = 0.22222222

Calculate the square root of the right side: 0.471404518

Break this problem into two subproblems by setting 
(x + 5) equal to 0.471404518 and -0.471404518.

Subproblem 1

x + 5 = 0.471404518 Simplifying x + 5 = 0.471404518 Reorder the terms: 5 + x = 0.471404518 Solving 5 + x = 0.471404518 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 0.471404518 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0.471404518 + -5 x = 0.471404518 + -5 Combine like terms: 0.471404518 + -5 = -4.528595482 x = -4.528595482 Simplifying x = -4.528595482

Subproblem 2

x + 5 = -0.471404518 Simplifying x + 5 = -0.471404518 Reorder the terms: 5 + x = -0.471404518 Solving 5 + x = -0.471404518 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -0.471404518 + -5 Combine like terms: 5 + -5 = 0 0 + x = -0.471404518 + -5 x = -0.471404518 + -5 Combine like terms: -0.471404518 + -5 = -5.471404518 x = -5.471404518 Simplifying x = -5.471404518

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-4.528595482, -5.471404518}

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