-X^2+57X-315=0

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Solution for -X^2+57X-315=0 equation:


Simplifying
-1X2 + 57X + -315 = 0

Reorder the terms:
-315 + 57X + -1X2 = 0

Solving
-315 + 57X + -1X2 = 0

Solving for variable 'X'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
315 + -57X + X2 = 0

Move the constant term to the right:

Add '-315' to each side of the equation.
315 + -57X + -315 + X2 = 0 + -315

Reorder the terms:
315 + -315 + -57X + X2 = 0 + -315

Combine like terms: 315 + -315 = 0
0 + -57X + X2 = 0 + -315
-57X + X2 = 0 + -315

Combine like terms: 0 + -315 = -315
-57X + X2 = -315

The X term is -57X.  Take half its coefficient (-28.5).
Square it (812.25) and add it to both sides.

Add '812.25' to each side of the equation.
-57X + 812.25 + X2 = -315 + 812.25

Reorder the terms:
812.25 + -57X + X2 = -315 + 812.25

Combine like terms: -315 + 812.25 = 497.25
812.25 + -57X + X2 = 497.25

Factor a perfect square on the left side:
(X + -28.5)(X + -28.5) = 497.25

Calculate the square root of the right side: 22.299103121

Break this problem into two subproblems by setting 
(X + -28.5) equal to 22.299103121 and -22.299103121.

Subproblem 1

X + -28.5 = 22.299103121 Simplifying X + -28.5 = 22.299103121 Reorder the terms: -28.5 + X = 22.299103121 Solving -28.5 + X = 22.299103121 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '28.5' to each side of the equation. -28.5 + 28.5 + X = 22.299103121 + 28.5 Combine like terms: -28.5 + 28.5 = 0.0 0.0 + X = 22.299103121 + 28.5 X = 22.299103121 + 28.5 Combine like terms: 22.299103121 + 28.5 = 50.799103121 X = 50.799103121 Simplifying X = 50.799103121

Subproblem 2

X + -28.5 = -22.299103121 Simplifying X + -28.5 = -22.299103121 Reorder the terms: -28.5 + X = -22.299103121 Solving -28.5 + X = -22.299103121 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '28.5' to each side of the equation. -28.5 + 28.5 + X = -22.299103121 + 28.5 Combine like terms: -28.5 + 28.5 = 0.0 0.0 + X = -22.299103121 + 28.5 X = -22.299103121 + 28.5 Combine like terms: -22.299103121 + 28.5 = 6.200896879 X = 6.200896879 Simplifying X = 6.200896879

Solution

The solution to the problem is based on the solutions from the subproblems. X = {50.799103121, 6.200896879}

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