36x^2-20x^2+9x-5=0

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Solution for 36x^2-20x^2+9x-5=0 equation:


Simplifying
36x2 + -20x2 + 9x + -5 = 0

Reorder the terms:
-5 + 9x + 36x2 + -20x2 = 0

Combine like terms: 36x2 + -20x2 = 16x2
-5 + 9x + 16x2 = 0

Solving
-5 + 9x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
-0.3125 + 0.5625x + x2 = 0

Move the constant term to the right:

Add '0.3125' to each side of the equation.
-0.3125 + 0.5625x + 0.3125 + x2 = 0 + 0.3125

Reorder the terms:
-0.3125 + 0.3125 + 0.5625x + x2 = 0 + 0.3125

Combine like terms: -0.3125 + 0.3125 = 0.0000
0.0000 + 0.5625x + x2 = 0 + 0.3125
0.5625x + x2 = 0 + 0.3125

Combine like terms: 0 + 0.3125 = 0.3125
0.5625x + x2 = 0.3125

The x term is 0.5625x.  Take half its coefficient (0.28125).
Square it (0.0791015625) and add it to both sides.

Add '0.0791015625' to each side of the equation.
0.5625x + 0.0791015625 + x2 = 0.3125 + 0.0791015625

Reorder the terms:
0.0791015625 + 0.5625x + x2 = 0.3125 + 0.0791015625

Combine like terms: 0.3125 + 0.0791015625 = 0.3916015625
0.0791015625 + 0.5625x + x2 = 0.3916015625

Factor a perfect square on the left side:
(x + 0.28125)(x + 0.28125) = 0.3916015625

Calculate the square root of the right side: 0.625780762

Break this problem into two subproblems by setting 
(x + 0.28125) equal to 0.625780762 and -0.625780762.

Subproblem 1

x + 0.28125 = 0.625780762 Simplifying x + 0.28125 = 0.625780762 Reorder the terms: 0.28125 + x = 0.625780762 Solving 0.28125 + x = 0.625780762 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.28125' to each side of the equation. 0.28125 + -0.28125 + x = 0.625780762 + -0.28125 Combine like terms: 0.28125 + -0.28125 = 0.00000 0.00000 + x = 0.625780762 + -0.28125 x = 0.625780762 + -0.28125 Combine like terms: 0.625780762 + -0.28125 = 0.344530762 x = 0.344530762 Simplifying x = 0.344530762

Subproblem 2

x + 0.28125 = -0.625780762 Simplifying x + 0.28125 = -0.625780762 Reorder the terms: 0.28125 + x = -0.625780762 Solving 0.28125 + x = -0.625780762 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.28125' to each side of the equation. 0.28125 + -0.28125 + x = -0.625780762 + -0.28125 Combine like terms: 0.28125 + -0.28125 = 0.00000 0.00000 + x = -0.625780762 + -0.28125 x = -0.625780762 + -0.28125 Combine like terms: -0.625780762 + -0.28125 = -0.907030762 x = -0.907030762 Simplifying x = -0.907030762

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.344530762, -0.907030762}

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