4x^2-8x-58=-9

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Solution for 4x^2-8x-58=-9 equation:


Simplifying
4x2 + -8x + -58 = -9

Reorder the terms:
-58 + -8x + 4x2 = -9

Solving
-58 + -8x + 4x2 = -9

Solving for variable 'x'.

Reorder the terms:
-58 + 9 + -8x + 4x2 = -9 + 9

Combine like terms: -58 + 9 = -49
-49 + -8x + 4x2 = -9 + 9

Combine like terms: -9 + 9 = 0
-49 + -8x + 4x2 = 0

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

Divide each side by '4'.
-12.25 + -2x + x2 = 0

Move the constant term to the right:

Add '12.25' to each side of the equation.
-12.25 + -2x + 12.25 + x2 = 0 + 12.25

Reorder the terms:
-12.25 + 12.25 + -2x + x2 = 0 + 12.25

Combine like terms: -12.25 + 12.25 = 0.00
0.00 + -2x + x2 = 0 + 12.25
-2x + x2 = 0 + 12.25

Combine like terms: 0 + 12.25 = 12.25
-2x + x2 = 12.25

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 12.25 + 1

Reorder the terms:
1 + -2x + x2 = 12.25 + 1

Combine like terms: 12.25 + 1 = 13.25
1 + -2x + x2 = 13.25

Factor a perfect square on the left side:
(x + -1)(x + -1) = 13.25

Calculate the square root of the right side: 3.640054945

Break this problem into two subproblems by setting 
(x + -1) equal to 3.640054945 and -3.640054945.

Subproblem 1

x + -1 = 3.640054945 Simplifying x + -1 = 3.640054945 Reorder the terms: -1 + x = 3.640054945 Solving -1 + x = 3.640054945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 3.640054945 + 1 Combine like terms: -1 + 1 = 0 0 + x = 3.640054945 + 1 x = 3.640054945 + 1 Combine like terms: 3.640054945 + 1 = 4.640054945 x = 4.640054945 Simplifying x = 4.640054945

Subproblem 2

x + -1 = -3.640054945 Simplifying x + -1 = -3.640054945 Reorder the terms: -1 + x = -3.640054945 Solving -1 + x = -3.640054945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -3.640054945 + 1 Combine like terms: -1 + 1 = 0 0 + x = -3.640054945 + 1 x = -3.640054945 + 1 Combine like terms: -3.640054945 + 1 = -2.640054945 x = -2.640054945 Simplifying x = -2.640054945

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.640054945, -2.640054945}

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