723x^2+290x-409=0

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Solution for 723x^2+290x-409=0 equation:


Simplifying
723x2 + 290x + -409 = 0

Reorder the terms:
-409 + 290x + 723x2 = 0

Solving
-409 + 290x + 723x2 = 0

Solving for variable 'x'.

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

Divide each side by '723'.
-0.5656984786 + 0.4011065007x + x2 = 0

Move the constant term to the right:

Add '0.5656984786' to each side of the equation.
-0.5656984786 + 0.4011065007x + 0.5656984786 + x2 = 0 + 0.5656984786

Reorder the terms:
-0.5656984786 + 0.5656984786 + 0.4011065007x + x2 = 0 + 0.5656984786

Combine like terms: -0.5656984786 + 0.5656984786 = 0.0000000000
0.0000000000 + 0.4011065007x + x2 = 0 + 0.5656984786
0.4011065007x + x2 = 0 + 0.5656984786

Combine like terms: 0 + 0.5656984786 = 0.5656984786
0.4011065007x + x2 = 0.5656984786

The x term is 0.4011065007x.  Take half its coefficient (0.2005532504).
Square it (0.04022160625) and add it to both sides.

Add '0.04022160625' to each side of the equation.
0.4011065007x + 0.04022160625 + x2 = 0.5656984786 + 0.04022160625

Reorder the terms:
0.04022160625 + 0.4011065007x + x2 = 0.5656984786 + 0.04022160625

Combine like terms: 0.5656984786 + 0.04022160625 = 0.60592008485
0.04022160625 + 0.4011065007x + x2 = 0.60592008485

Factor a perfect square on the left side:
(x + 0.2005532504)(x + 0.2005532504) = 0.60592008485

Calculate the square root of the right side: 0.778408688

Break this problem into two subproblems by setting 
(x + 0.2005532504) equal to 0.778408688 and -0.778408688.

Subproblem 1

x + 0.2005532504 = 0.778408688 Simplifying x + 0.2005532504 = 0.778408688 Reorder the terms: 0.2005532504 + x = 0.778408688 Solving 0.2005532504 + x = 0.778408688 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2005532504' to each side of the equation. 0.2005532504 + -0.2005532504 + x = 0.778408688 + -0.2005532504 Combine like terms: 0.2005532504 + -0.2005532504 = 0.0000000000 0.0000000000 + x = 0.778408688 + -0.2005532504 x = 0.778408688 + -0.2005532504 Combine like terms: 0.778408688 + -0.2005532504 = 0.5778554376 x = 0.5778554376 Simplifying x = 0.5778554376

Subproblem 2

x + 0.2005532504 = -0.778408688 Simplifying x + 0.2005532504 = -0.778408688 Reorder the terms: 0.2005532504 + x = -0.778408688 Solving 0.2005532504 + x = -0.778408688 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2005532504' to each side of the equation. 0.2005532504 + -0.2005532504 + x = -0.778408688 + -0.2005532504 Combine like terms: 0.2005532504 + -0.2005532504 = 0.0000000000 0.0000000000 + x = -0.778408688 + -0.2005532504 x = -0.778408688 + -0.2005532504 Combine like terms: -0.778408688 + -0.2005532504 = -0.9789619384 x = -0.9789619384 Simplifying x = -0.9789619384

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5778554376, -0.9789619384}

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