.3x^2-30x=.3

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Solution for .3x^2-30x=.3 equation:


Simplifying
0.3x2 + -30x = 0.3

Reorder the terms:
-30x + 0.3x2 = 0.3

Solving
-30x + 0.3x2 = 0.3

Solving for variable 'x'.

Reorder the terms:
-0.3 + -30x + 0.3x2 = 0.3 + -0.3

Combine like terms: 0.3 + -0.3 = 0.0
-0.3 + -30x + 0.3x2 = 0.0

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

Divide each side by '0.3'.
-1 + -100x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -100x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + -100x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -100x + x2 = 0 + 1
-100x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
-100x + x2 = 1

The x term is -100x.  Take half its coefficient (-50).
Square it (2500) and add it to both sides.

Add '2500' to each side of the equation.
-100x + 2500 + x2 = 1 + 2500

Reorder the terms:
2500 + -100x + x2 = 1 + 2500

Combine like terms: 1 + 2500 = 2501
2500 + -100x + x2 = 2501

Factor a perfect square on the left side:
(x + -50)(x + -50) = 2501

Calculate the square root of the right side: 50.009999

Break this problem into two subproblems by setting 
(x + -50) equal to 50.009999 and -50.009999.

Subproblem 1

x + -50 = 50.009999 Simplifying x + -50 = 50.009999 Reorder the terms: -50 + x = 50.009999 Solving -50 + x = 50.009999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '50' to each side of the equation. -50 + 50 + x = 50.009999 + 50 Combine like terms: -50 + 50 = 0 0 + x = 50.009999 + 50 x = 50.009999 + 50 Combine like terms: 50.009999 + 50 = 100.009999 x = 100.009999 Simplifying x = 100.009999

Subproblem 2

x + -50 = -50.009999 Simplifying x + -50 = -50.009999 Reorder the terms: -50 + x = -50.009999 Solving -50 + x = -50.009999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '50' to each side of the equation. -50 + 50 + x = -50.009999 + 50 Combine like terms: -50 + 50 = 0 0 + x = -50.009999 + 50 x = -50.009999 + 50 Combine like terms: -50.009999 + 50 = -0.009999 x = -0.009999 Simplifying x = -0.009999

Solution

The solution to the problem is based on the solutions from the subproblems. x = {100.009999, -0.009999}

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