.1x^2-3x-2378=0

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Solution for .1x^2-3x-2378=0 equation:


Simplifying
0.1x2 + -3x + -2378 = 0

Reorder the terms:
-2378 + -3x + 0.1x2 = 0

Solving
-2378 + -3x + 0.1x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.1'.
-23780 + -30x + x2 = 0

Move the constant term to the right:

Add '23780' to each side of the equation.
-23780 + -30x + 23780 + x2 = 0 + 23780

Reorder the terms:
-23780 + 23780 + -30x + x2 = 0 + 23780

Combine like terms: -23780 + 23780 = 0
0 + -30x + x2 = 0 + 23780
-30x + x2 = 0 + 23780

Combine like terms: 0 + 23780 = 23780
-30x + x2 = 23780

The x term is -30x.  Take half its coefficient (-15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
-30x + 225 + x2 = 23780 + 225

Reorder the terms:
225 + -30x + x2 = 23780 + 225

Combine like terms: 23780 + 225 = 24005
225 + -30x + x2 = 24005

Factor a perfect square on the left side:
(x + -15)(x + -15) = 24005

Calculate the square root of the right side: 154.935470439

Break this problem into two subproblems by setting 
(x + -15) equal to 154.935470439 and -154.935470439.

Subproblem 1

x + -15 = 154.935470439 Simplifying x + -15 = 154.935470439 Reorder the terms: -15 + x = 154.935470439 Solving -15 + x = 154.935470439 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + x = 154.935470439 + 15 Combine like terms: -15 + 15 = 0 0 + x = 154.935470439 + 15 x = 154.935470439 + 15 Combine like terms: 154.935470439 + 15 = 169.935470439 x = 169.935470439 Simplifying x = 169.935470439

Subproblem 2

x + -15 = -154.935470439 Simplifying x + -15 = -154.935470439 Reorder the terms: -15 + x = -154.935470439 Solving -15 + x = -154.935470439 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + x = -154.935470439 + 15 Combine like terms: -15 + 15 = 0 0 + x = -154.935470439 + 15 x = -154.935470439 + 15 Combine like terms: -154.935470439 + 15 = -139.935470439 x = -139.935470439 Simplifying x = -139.935470439

Solution

The solution to the problem is based on the solutions from the subproblems. x = {169.935470439, -139.935470439}

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