200+199.4x-0.3x^2=0

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Solution for 200+199.4x-0.3x^2=0 equation:


Simplifying
200 + 199.4x + -0.3x2 = 0

Solving
200 + 199.4x + -0.3x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.3 the coefficient of the squared term: 

Divide each side by '-0.3'.
-666.6666667 + -664.6666667x + x2 = 0

Move the constant term to the right:

Add '666.6666667' to each side of the equation.
-666.6666667 + -664.6666667x + 666.6666667 + x2 = 0 + 666.6666667

Reorder the terms:
-666.6666667 + 666.6666667 + -664.6666667x + x2 = 0 + 666.6666667

Combine like terms: -666.6666667 + 666.6666667 = 0.0000000
0.0000000 + -664.6666667x + x2 = 0 + 666.6666667
-664.6666667x + x2 = 0 + 666.6666667

Combine like terms: 0 + 666.6666667 = 666.6666667
-664.6666667x + x2 = 666.6666667

The x term is -664.6666667x.  Take half its coefficient (-332.3333334).
Square it (110445.4445) and add it to both sides.

Add '110445.4445' to each side of the equation.
-664.6666667x + 110445.4445 + x2 = 666.6666667 + 110445.4445

Reorder the terms:
110445.4445 + -664.6666667x + x2 = 666.6666667 + 110445.4445

Combine like terms: 666.6666667 + 110445.4445 = 111112.1111667
110445.4445 + -664.6666667x + x2 = 111112.1111667

Factor a perfect square on the left side:
(x + -332.3333334)(x + -332.3333334) = 111112.1111667

Calculate the square root of the right side: 333.334833413

Break this problem into two subproblems by setting 
(x + -332.3333334) equal to 333.334833413 and -333.334833413.

Subproblem 1

x + -332.3333334 = 333.334833413 Simplifying x + -332.3333334 = 333.334833413 Reorder the terms: -332.3333334 + x = 333.334833413 Solving -332.3333334 + x = 333.334833413 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '332.3333334' to each side of the equation. -332.3333334 + 332.3333334 + x = 333.334833413 + 332.3333334 Combine like terms: -332.3333334 + 332.3333334 = 0.0000000 0.0000000 + x = 333.334833413 + 332.3333334 x = 333.334833413 + 332.3333334 Combine like terms: 333.334833413 + 332.3333334 = 665.668166813 x = 665.668166813 Simplifying x = 665.668166813

Subproblem 2

x + -332.3333334 = -333.334833413 Simplifying x + -332.3333334 = -333.334833413 Reorder the terms: -332.3333334 + x = -333.334833413 Solving -332.3333334 + x = -333.334833413 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '332.3333334' to each side of the equation. -332.3333334 + 332.3333334 + x = -333.334833413 + 332.3333334 Combine like terms: -332.3333334 + 332.3333334 = 0.0000000 0.0000000 + x = -333.334833413 + 332.3333334 x = -333.334833413 + 332.3333334 Combine like terms: -333.334833413 + 332.3333334 = -1.001500013 x = -1.001500013 Simplifying x = -1.001500013

Solution

The solution to the problem is based on the solutions from the subproblems. x = {665.668166813, -1.001500013}

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