-9x^2+11=-10x

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Solution for -9x^2+11=-10x equation:


Simplifying
-9x2 + 11 = -10x

Reorder the terms:
11 + -9x2 = -10x

Solving
11 + -9x2 = -10x

Solving for variable 'x'.

Reorder the terms:
11 + 10x + -9x2 = -10x + 10x

Combine like terms: -10x + 10x = 0
11 + 10x + -9x2 = 0

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

Divide each side by '-9'.
-1.222222222 + -1.111111111x + x2 = 0

Move the constant term to the right:

Add '1.222222222' to each side of the equation.
-1.222222222 + -1.111111111x + 1.222222222 + x2 = 0 + 1.222222222

Reorder the terms:
-1.222222222 + 1.222222222 + -1.111111111x + x2 = 0 + 1.222222222

Combine like terms: -1.222222222 + 1.222222222 = 0.000000000
0.000000000 + -1.111111111x + x2 = 0 + 1.222222222
-1.111111111x + x2 = 0 + 1.222222222

Combine like terms: 0 + 1.222222222 = 1.222222222
-1.111111111x + x2 = 1.222222222

The x term is -1.111111111x.  Take half its coefficient (-0.5555555555).
Square it (0.3086419752) and add it to both sides.

Add '0.3086419752' to each side of the equation.
-1.111111111x + 0.3086419752 + x2 = 1.222222222 + 0.3086419752

Reorder the terms:
0.3086419752 + -1.111111111x + x2 = 1.222222222 + 0.3086419752

Combine like terms: 1.222222222 + 0.3086419752 = 1.5308641972
0.3086419752 + -1.111111111x + x2 = 1.5308641972

Factor a perfect square on the left side:
(x + -0.5555555555)(x + -0.5555555555) = 1.5308641972

Calculate the square root of the right side: 1.237280969

Break this problem into two subproblems by setting 
(x + -0.5555555555) equal to 1.237280969 and -1.237280969.

Subproblem 1

x + -0.5555555555 = 1.237280969 Simplifying x + -0.5555555555 = 1.237280969 Reorder the terms: -0.5555555555 + x = 1.237280969 Solving -0.5555555555 + x = 1.237280969 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5555555555' to each side of the equation. -0.5555555555 + 0.5555555555 + x = 1.237280969 + 0.5555555555 Combine like terms: -0.5555555555 + 0.5555555555 = 0.0000000000 0.0000000000 + x = 1.237280969 + 0.5555555555 x = 1.237280969 + 0.5555555555 Combine like terms: 1.237280969 + 0.5555555555 = 1.7928365245 x = 1.7928365245 Simplifying x = 1.7928365245

Subproblem 2

x + -0.5555555555 = -1.237280969 Simplifying x + -0.5555555555 = -1.237280969 Reorder the terms: -0.5555555555 + x = -1.237280969 Solving -0.5555555555 + x = -1.237280969 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5555555555' to each side of the equation. -0.5555555555 + 0.5555555555 + x = -1.237280969 + 0.5555555555 Combine like terms: -0.5555555555 + 0.5555555555 = 0.0000000000 0.0000000000 + x = -1.237280969 + 0.5555555555 x = -1.237280969 + 0.5555555555 Combine like terms: -1.237280969 + 0.5555555555 = -0.6817254135 x = -0.6817254135 Simplifying x = -0.6817254135

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.7928365245, -0.6817254135}

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