-0.0004x^2-0.3x+0.29=0

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Solution for -0.0004x^2-0.3x+0.29=0 equation:


Simplifying
-0.0004x2 + -0.3x + 0.29 = 0

Reorder the terms:
0.29 + -0.3x + -0.0004x2 = 0

Solving
0.29 + -0.3x + -0.0004x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.0004 the coefficient of the squared term: 

Divide each side by '-0.0004'.
-725 + 750x + x2 = 0

Move the constant term to the right:

Add '725' to each side of the equation.
-725 + 750x + 725 + x2 = 0 + 725

Reorder the terms:
-725 + 725 + 750x + x2 = 0 + 725

Combine like terms: -725 + 725 = 0
0 + 750x + x2 = 0 + 725
750x + x2 = 0 + 725

Combine like terms: 0 + 725 = 725
750x + x2 = 725

The x term is 750x.  Take half its coefficient (375).
Square it (140625) and add it to both sides.

Add '140625' to each side of the equation.
750x + 140625 + x2 = 725 + 140625

Reorder the terms:
140625 + 750x + x2 = 725 + 140625

Combine like terms: 725 + 140625 = 141350
140625 + 750x + x2 = 141350

Factor a perfect square on the left side:
(x + 375)(x + 375) = 141350

Calculate the square root of the right side: 375.965423942

Break this problem into two subproblems by setting 
(x + 375) equal to 375.965423942 and -375.965423942.

Subproblem 1

x + 375 = 375.965423942 Simplifying x + 375 = 375.965423942 Reorder the terms: 375 + x = 375.965423942 Solving 375 + x = 375.965423942 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-375' to each side of the equation. 375 + -375 + x = 375.965423942 + -375 Combine like terms: 375 + -375 = 0 0 + x = 375.965423942 + -375 x = 375.965423942 + -375 Combine like terms: 375.965423942 + -375 = 0.965423942 x = 0.965423942 Simplifying x = 0.965423942

Subproblem 2

x + 375 = -375.965423942 Simplifying x + 375 = -375.965423942 Reorder the terms: 375 + x = -375.965423942 Solving 375 + x = -375.965423942 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-375' to each side of the equation. 375 + -375 + x = -375.965423942 + -375 Combine like terms: 375 + -375 = 0 0 + x = -375.965423942 + -375 x = -375.965423942 + -375 Combine like terms: -375.965423942 + -375 = -750.965423942 x = -750.965423942 Simplifying x = -750.965423942

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.965423942, -750.965423942}

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