5x^2-62x-7=0

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Solution for 5x^2-62x-7=0 equation:


Simplifying
5x2 + -62x + -7 = 0

Reorder the terms:
-7 + -62x + 5x2 = 0

Solving
-7 + -62x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-1.4 + -12.4x + x2 = 0

Move the constant term to the right:

Add '1.4' to each side of the equation.
-1.4 + -12.4x + 1.4 + x2 = 0 + 1.4

Reorder the terms:
-1.4 + 1.4 + -12.4x + x2 = 0 + 1.4

Combine like terms: -1.4 + 1.4 = 0.0
0.0 + -12.4x + x2 = 0 + 1.4
-12.4x + x2 = 0 + 1.4

Combine like terms: 0 + 1.4 = 1.4
-12.4x + x2 = 1.4

The x term is -12.4x.  Take half its coefficient (-6.2).
Square it (38.44) and add it to both sides.

Add '38.44' to each side of the equation.
-12.4x + 38.44 + x2 = 1.4 + 38.44

Reorder the terms:
38.44 + -12.4x + x2 = 1.4 + 38.44

Combine like terms: 1.4 + 38.44 = 39.84
38.44 + -12.4x + x2 = 39.84

Factor a perfect square on the left side:
(x + -6.2)(x + -6.2) = 39.84

Calculate the square root of the right side: 6.311893535

Break this problem into two subproblems by setting 
(x + -6.2) equal to 6.311893535 and -6.311893535.

Subproblem 1

x + -6.2 = 6.311893535 Simplifying x + -6.2 = 6.311893535 Reorder the terms: -6.2 + x = 6.311893535 Solving -6.2 + x = 6.311893535 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.2' to each side of the equation. -6.2 + 6.2 + x = 6.311893535 + 6.2 Combine like terms: -6.2 + 6.2 = 0.0 0.0 + x = 6.311893535 + 6.2 x = 6.311893535 + 6.2 Combine like terms: 6.311893535 + 6.2 = 12.511893535 x = 12.511893535 Simplifying x = 12.511893535

Subproblem 2

x + -6.2 = -6.311893535 Simplifying x + -6.2 = -6.311893535 Reorder the terms: -6.2 + x = -6.311893535 Solving -6.2 + x = -6.311893535 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.2' to each side of the equation. -6.2 + 6.2 + x = -6.311893535 + 6.2 Combine like terms: -6.2 + 6.2 = 0.0 0.0 + x = -6.311893535 + 6.2 x = -6.311893535 + 6.2 Combine like terms: -6.311893535 + 6.2 = -0.111893535 x = -0.111893535 Simplifying x = -0.111893535

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.511893535, -0.111893535}

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