-9x^2+5x+3=0

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Solution for -9x^2+5x+3=0 equation:


Simplifying
-9x2 + 5x + 3 = 0

Reorder the terms:
3 + 5x + -9x2 = 0

Solving
3 + 5x + -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'.
-0.3333333333 + -0.5555555556x + x2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -0.5555555556x + 0.3333333333 + x2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -0.5555555556x + x2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -0.5555555556x + x2 = 0 + 0.3333333333
-0.5555555556x + x2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-0.5555555556x + x2 = 0.3333333333

The x term is -0.5555555556x.  Take half its coefficient (-0.2777777778).
Square it (0.07716049384) and add it to both sides.

Add '0.07716049384' to each side of the equation.
-0.5555555556x + 0.07716049384 + x2 = 0.3333333333 + 0.07716049384

Reorder the terms:
0.07716049384 + -0.5555555556x + x2 = 0.3333333333 + 0.07716049384

Combine like terms: 0.3333333333 + 0.07716049384 = 0.41049382714
0.07716049384 + -0.5555555556x + x2 = 0.41049382714

Factor a perfect square on the left side:
(x + -0.2777777778)(x + -0.2777777778) = 0.41049382714

Calculate the square root of the right side: 0.640697922

Break this problem into two subproblems by setting 
(x + -0.2777777778) equal to 0.640697922 and -0.640697922.

Subproblem 1

x + -0.2777777778 = 0.640697922 Simplifying x + -0.2777777778 = 0.640697922 Reorder the terms: -0.2777777778 + x = 0.640697922 Solving -0.2777777778 + x = 0.640697922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2777777778' to each side of the equation. -0.2777777778 + 0.2777777778 + x = 0.640697922 + 0.2777777778 Combine like terms: -0.2777777778 + 0.2777777778 = 0.0000000000 0.0000000000 + x = 0.640697922 + 0.2777777778 x = 0.640697922 + 0.2777777778 Combine like terms: 0.640697922 + 0.2777777778 = 0.9184756998 x = 0.9184756998 Simplifying x = 0.9184756998

Subproblem 2

x + -0.2777777778 = -0.640697922 Simplifying x + -0.2777777778 = -0.640697922 Reorder the terms: -0.2777777778 + x = -0.640697922 Solving -0.2777777778 + x = -0.640697922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2777777778' to each side of the equation. -0.2777777778 + 0.2777777778 + x = -0.640697922 + 0.2777777778 Combine like terms: -0.2777777778 + 0.2777777778 = 0.0000000000 0.0000000000 + x = -0.640697922 + 0.2777777778 x = -0.640697922 + 0.2777777778 Combine like terms: -0.640697922 + 0.2777777778 = -0.3629201442 x = -0.3629201442 Simplifying x = -0.3629201442

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.9184756998, -0.3629201442}

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