9x^2+1x-800=0

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Solution for 9x^2+1x-800=0 equation:


Simplifying
9x2 + 1x + -800 = 0

Reorder the terms:
-800 + 1x + 9x2 = 0

Solving
-800 + 1x + 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'.
-88.88888889 + 0.1111111111x + x2 = 0

Move the constant term to the right:

Add '88.88888889' to each side of the equation.
-88.88888889 + 0.1111111111x + 88.88888889 + x2 = 0 + 88.88888889

Reorder the terms:
-88.88888889 + 88.88888889 + 0.1111111111x + x2 = 0 + 88.88888889

Combine like terms: -88.88888889 + 88.88888889 = 0.00000000
0.00000000 + 0.1111111111x + x2 = 0 + 88.88888889
0.1111111111x + x2 = 0 + 88.88888889

Combine like terms: 0 + 88.88888889 = 88.88888889
0.1111111111x + x2 = 88.88888889

The x term is 0.1111111111x.  Take half its coefficient (0.05555555555).
Square it (0.003086419752) and add it to both sides.

Add '0.003086419752' to each side of the equation.
0.1111111111x + 0.003086419752 + x2 = 88.88888889 + 0.003086419752

Reorder the terms:
0.003086419752 + 0.1111111111x + x2 = 88.88888889 + 0.003086419752

Combine like terms: 88.88888889 + 0.003086419752 = 88.891975309752
0.003086419752 + 0.1111111111x + x2 = 88.891975309752

Factor a perfect square on the left side:
(x + 0.05555555555)(x + 0.05555555555) = 88.891975309752

Calculate the square root of the right side: 9.428254097

Break this problem into two subproblems by setting 
(x + 0.05555555555) equal to 9.428254097 and -9.428254097.

Subproblem 1

x + 0.05555555555 = 9.428254097 Simplifying x + 0.05555555555 = 9.428254097 Reorder the terms: 0.05555555555 + x = 9.428254097 Solving 0.05555555555 + x = 9.428254097 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.05555555555' to each side of the equation. 0.05555555555 + -0.05555555555 + x = 9.428254097 + -0.05555555555 Combine like terms: 0.05555555555 + -0.05555555555 = 0.00000000000 0.00000000000 + x = 9.428254097 + -0.05555555555 x = 9.428254097 + -0.05555555555 Combine like terms: 9.428254097 + -0.05555555555 = 9.37269854145 x = 9.37269854145 Simplifying x = 9.37269854145

Subproblem 2

x + 0.05555555555 = -9.428254097 Simplifying x + 0.05555555555 = -9.428254097 Reorder the terms: 0.05555555555 + x = -9.428254097 Solving 0.05555555555 + x = -9.428254097 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.05555555555' to each side of the equation. 0.05555555555 + -0.05555555555 + x = -9.428254097 + -0.05555555555 Combine like terms: 0.05555555555 + -0.05555555555 = 0.00000000000 0.00000000000 + x = -9.428254097 + -0.05555555555 x = -9.428254097 + -0.05555555555 Combine like terms: -9.428254097 + -0.05555555555 = -9.48380965255 x = -9.48380965255 Simplifying x = -9.48380965255

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.37269854145, -9.48380965255}

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