2x^2-6x-625=0

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Solution for 2x^2-6x-625=0 equation:


Simplifying
2x2 + -6x + -625 = 0

Reorder the terms:
-625 + -6x + 2x2 = 0

Solving
-625 + -6x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-312.5 + -3x + x2 = 0

Move the constant term to the right:

Add '312.5' to each side of the equation.
-312.5 + -3x + 312.5 + x2 = 0 + 312.5

Reorder the terms:
-312.5 + 312.5 + -3x + x2 = 0 + 312.5

Combine like terms: -312.5 + 312.5 = 0.0
0.0 + -3x + x2 = 0 + 312.5
-3x + x2 = 0 + 312.5

Combine like terms: 0 + 312.5 = 312.5
-3x + x2 = 312.5

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 312.5 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 312.5 + 2.25

Combine like terms: 312.5 + 2.25 = 314.75
2.25 + -3x + x2 = 314.75

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 314.75

Calculate the square root of the right side: 17.741194999

Break this problem into two subproblems by setting 
(x + -1.5) equal to 17.741194999 and -17.741194999.

Subproblem 1

x + -1.5 = 17.741194999 Simplifying x + -1.5 = 17.741194999 Reorder the terms: -1.5 + x = 17.741194999 Solving -1.5 + x = 17.741194999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 17.741194999 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 17.741194999 + 1.5 x = 17.741194999 + 1.5 Combine like terms: 17.741194999 + 1.5 = 19.241194999 x = 19.241194999 Simplifying x = 19.241194999

Subproblem 2

x + -1.5 = -17.741194999 Simplifying x + -1.5 = -17.741194999 Reorder the terms: -1.5 + x = -17.741194999 Solving -1.5 + x = -17.741194999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -17.741194999 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -17.741194999 + 1.5 x = -17.741194999 + 1.5 Combine like terms: -17.741194999 + 1.5 = -16.241194999 x = -16.241194999 Simplifying x = -16.241194999

Solution

The solution to the problem is based on the solutions from the subproblems. x = {19.241194999, -16.241194999}

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