9x^2+173x+818=0

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Solution for 9x^2+173x+818=0 equation:


Simplifying
9x2 + 173x + 818 = 0

Reorder the terms:
818 + 173x + 9x2 = 0

Solving
818 + 173x + 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'.
90.88888889 + 19.22222222x + x2 = 0

Move the constant term to the right:

Add '-90.88888889' to each side of the equation.
90.88888889 + 19.22222222x + -90.88888889 + x2 = 0 + -90.88888889

Reorder the terms:
90.88888889 + -90.88888889 + 19.22222222x + x2 = 0 + -90.88888889

Combine like terms: 90.88888889 + -90.88888889 = 0.00000000
0.00000000 + 19.22222222x + x2 = 0 + -90.88888889
19.22222222x + x2 = 0 + -90.88888889

Combine like terms: 0 + -90.88888889 = -90.88888889
19.22222222x + x2 = -90.88888889

The x term is 19.22222222x.  Take half its coefficient (9.61111111).
Square it (92.37345677) and add it to both sides.

Add '92.37345677' to each side of the equation.
19.22222222x + 92.37345677 + x2 = -90.88888889 + 92.37345677

Reorder the terms:
92.37345677 + 19.22222222x + x2 = -90.88888889 + 92.37345677

Combine like terms: -90.88888889 + 92.37345677 = 1.48456788
92.37345677 + 19.22222222x + x2 = 1.48456788

Factor a perfect square on the left side:
(x + 9.61111111)(x + 9.61111111) = 1.48456788

Calculate the square root of the right side: 1.218428447

Break this problem into two subproblems by setting 
(x + 9.61111111) equal to 1.218428447 and -1.218428447.

Subproblem 1

x + 9.61111111 = 1.218428447 Simplifying x + 9.61111111 = 1.218428447 Reorder the terms: 9.61111111 + x = 1.218428447 Solving 9.61111111 + x = 1.218428447 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.61111111' to each side of the equation. 9.61111111 + -9.61111111 + x = 1.218428447 + -9.61111111 Combine like terms: 9.61111111 + -9.61111111 = 0.00000000 0.00000000 + x = 1.218428447 + -9.61111111 x = 1.218428447 + -9.61111111 Combine like terms: 1.218428447 + -9.61111111 = -8.392682663 x = -8.392682663 Simplifying x = -8.392682663

Subproblem 2

x + 9.61111111 = -1.218428447 Simplifying x + 9.61111111 = -1.218428447 Reorder the terms: 9.61111111 + x = -1.218428447 Solving 9.61111111 + x = -1.218428447 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.61111111' to each side of the equation. 9.61111111 + -9.61111111 + x = -1.218428447 + -9.61111111 Combine like terms: 9.61111111 + -9.61111111 = 0.00000000 0.00000000 + x = -1.218428447 + -9.61111111 x = -1.218428447 + -9.61111111 Combine like terms: -1.218428447 + -9.61111111 = -10.829539557 x = -10.829539557 Simplifying x = -10.829539557

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-8.392682663, -10.829539557}

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