0=39x^2-478x-2463

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Solution for 0=39x^2-478x-2463 equation:


Simplifying
0 = 39x2 + -478x + -2463

Reorder the terms:
0 = -2463 + -478x + 39x2

Solving
0 = -2463 + -478x + 39x2

Solving for variable 'x'.

Combine like terms: 0 + 2463 = 2463
2463 + 478x + -39x2 = -2463 + -478x + 39x2 + 2463 + 478x + -39x2

Reorder the terms:
2463 + 478x + -39x2 = -2463 + 2463 + -478x + 478x + 39x2 + -39x2

Combine like terms: -2463 + 2463 = 0
2463 + 478x + -39x2 = 0 + -478x + 478x + 39x2 + -39x2
2463 + 478x + -39x2 = -478x + 478x + 39x2 + -39x2

Combine like terms: -478x + 478x = 0
2463 + 478x + -39x2 = 0 + 39x2 + -39x2
2463 + 478x + -39x2 = 39x2 + -39x2

Combine like terms: 39x2 + -39x2 = 0
2463 + 478x + -39x2 = 0

Begin completing the square.  Divide all terms by
-39 the coefficient of the squared term: 

Divide each side by '-39'.
-63.15384615 + -12.25641026x + x2 = 0

Move the constant term to the right:

Add '63.15384615' to each side of the equation.
-63.15384615 + -12.25641026x + 63.15384615 + x2 = 0 + 63.15384615

Reorder the terms:
-63.15384615 + 63.15384615 + -12.25641026x + x2 = 0 + 63.15384615

Combine like terms: -63.15384615 + 63.15384615 = 0.00000000
0.00000000 + -12.25641026x + x2 = 0 + 63.15384615
-12.25641026x + x2 = 0 + 63.15384615

Combine like terms: 0 + 63.15384615 = 63.15384615
-12.25641026x + x2 = 63.15384615

The x term is -12.25641026x.  Take half its coefficient (-6.12820513).
Square it (37.55489812) and add it to both sides.

Add '37.55489812' to each side of the equation.
-12.25641026x + 37.55489812 + x2 = 63.15384615 + 37.55489812

Reorder the terms:
37.55489812 + -12.25641026x + x2 = 63.15384615 + 37.55489812

Combine like terms: 63.15384615 + 37.55489812 = 100.70874427
37.55489812 + -12.25641026x + x2 = 100.70874427

Factor a perfect square on the left side:
(x + -6.12820513)(x + -6.12820513) = 100.70874427

Calculate the square root of the right side: 10.035374645

Break this problem into two subproblems by setting 
(x + -6.12820513) equal to 10.035374645 and -10.035374645.

Subproblem 1

x + -6.12820513 = 10.035374645 Simplifying x + -6.12820513 = 10.035374645 Reorder the terms: -6.12820513 + x = 10.035374645 Solving -6.12820513 + x = 10.035374645 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.12820513' to each side of the equation. -6.12820513 + 6.12820513 + x = 10.035374645 + 6.12820513 Combine like terms: -6.12820513 + 6.12820513 = 0.00000000 0.00000000 + x = 10.035374645 + 6.12820513 x = 10.035374645 + 6.12820513 Combine like terms: 10.035374645 + 6.12820513 = 16.163579775 x = 16.163579775 Simplifying x = 16.163579775

Subproblem 2

x + -6.12820513 = -10.035374645 Simplifying x + -6.12820513 = -10.035374645 Reorder the terms: -6.12820513 + x = -10.035374645 Solving -6.12820513 + x = -10.035374645 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.12820513' to each side of the equation. -6.12820513 + 6.12820513 + x = -10.035374645 + 6.12820513 Combine like terms: -6.12820513 + 6.12820513 = 0.00000000 0.00000000 + x = -10.035374645 + 6.12820513 x = -10.035374645 + 6.12820513 Combine like terms: -10.035374645 + 6.12820513 = -3.907169515 x = -3.907169515 Simplifying x = -3.907169515

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.163579775, -3.907169515}

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