x^2-0.3x=200000

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Solution for x^2-0.3x=200000 equation:


Simplifying
x2 + -0.3x = 200000

Reorder the terms:
-0.3x + x2 = 200000

Solving
-0.3x + x2 = 200000

Solving for variable 'x'.

Reorder the terms:
-200000 + -0.3x + x2 = 200000 + -200000

Combine like terms: 200000 + -200000 = 0
-200000 + -0.3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '200000' to each side of the equation.
-200000 + -0.3x + 200000 + x2 = 0 + 200000

Reorder the terms:
-200000 + 200000 + -0.3x + x2 = 0 + 200000

Combine like terms: -200000 + 200000 = 0
0 + -0.3x + x2 = 0 + 200000
-0.3x + x2 = 0 + 200000

Combine like terms: 0 + 200000 = 200000
-0.3x + x2 = 200000

The x term is -0.3x.  Take half its coefficient (-0.15).
Square it (0.0225) and add it to both sides.

Add '0.0225' to each side of the equation.
-0.3x + 0.0225 + x2 = 200000 + 0.0225

Reorder the terms:
0.0225 + -0.3x + x2 = 200000 + 0.0225

Combine like terms: 200000 + 0.0225 = 200000.0225
0.0225 + -0.3x + x2 = 200000.0225

Factor a perfect square on the left side:
(x + -0.15)(x + -0.15) = 200000.0225

Calculate the square root of the right side: 447.213620656

Break this problem into two subproblems by setting 
(x + -0.15) equal to 447.213620656 and -447.213620656.

Subproblem 1

x + -0.15 = 447.213620656 Simplifying x + -0.15 = 447.213620656 Reorder the terms: -0.15 + x = 447.213620656 Solving -0.15 + x = 447.213620656 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.15' to each side of the equation. -0.15 + 0.15 + x = 447.213620656 + 0.15 Combine like terms: -0.15 + 0.15 = 0.00 0.00 + x = 447.213620656 + 0.15 x = 447.213620656 + 0.15 Combine like terms: 447.213620656 + 0.15 = 447.363620656 x = 447.363620656 Simplifying x = 447.363620656

Subproblem 2

x + -0.15 = -447.213620656 Simplifying x + -0.15 = -447.213620656 Reorder the terms: -0.15 + x = -447.213620656 Solving -0.15 + x = -447.213620656 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.15' to each side of the equation. -0.15 + 0.15 + x = -447.213620656 + 0.15 Combine like terms: -0.15 + 0.15 = 0.00 0.00 + x = -447.213620656 + 0.15 x = -447.213620656 + 0.15 Combine like terms: -447.213620656 + 0.15 = -447.063620656 x = -447.063620656 Simplifying x = -447.063620656

Solution

The solution to the problem is based on the solutions from the subproblems. x = {447.363620656, -447.063620656}

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