.8x^2-24x+250=82.80

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Solution for .8x^2-24x+250=82.80 equation:


Simplifying
0.8x2 + -24x + 250 = 82.80

Reorder the terms:
250 + -24x + 0.8x2 = 82.80

Solving
250 + -24x + 0.8x2 = 82.80

Solving for variable 'x'.

Reorder the terms:
250 + -82.80 + -24x + 0.8x2 = 82.80 + -82.80

Combine like terms: 250 + -82.80 = 167.2
167.2 + -24x + 0.8x2 = 82.80 + -82.80

Combine like terms: 82.80 + -82.80 = 0.00
167.2 + -24x + 0.8x2 = 0.00

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

Divide each side by '0.8'.
209 + -30x + x2 = 0.0

Move the constant term to the right:

Add '-209' to each side of the equation.
209 + -30x + -209 + x2 = 0.0 + -209

Reorder the terms:
209 + -209 + -30x + x2 = 0.0 + -209

Combine like terms: 209 + -209 = 0
0 + -30x + x2 = 0.0 + -209
-30x + x2 = 0.0 + -209

Combine like terms: 0.0 + -209 = -209
-30x + x2 = -209

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 = -209 + 225

Reorder the terms:
225 + -30x + x2 = -209 + 225

Combine like terms: -209 + 225 = 16
225 + -30x + x2 = 16

Factor a perfect square on the left side:
(x + -15)(x + -15) = 16

Calculate the square root of the right side: 4

Break this problem into two subproblems by setting 
(x + -15) equal to 4 and -4.

Subproblem 1

x + -15 = 4 Simplifying x + -15 = 4 Reorder the terms: -15 + x = 4 Solving -15 + x = 4 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 = 4 + 15 Combine like terms: -15 + 15 = 0 0 + x = 4 + 15 x = 4 + 15 Combine like terms: 4 + 15 = 19 x = 19 Simplifying x = 19

Subproblem 2

x + -15 = -4 Simplifying x + -15 = -4 Reorder the terms: -15 + x = -4 Solving -15 + x = -4 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 = -4 + 15 Combine like terms: -15 + 15 = 0 0 + x = -4 + 15 x = -4 + 15 Combine like terms: -4 + 15 = 11 x = 11 Simplifying x = 11

Solution

The solution to the problem is based on the solutions from the subproblems. x = {19, 11}

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