x^2-6x-76=0

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Solution for x^2-6x-76=0 equation:


Simplifying
x2 + -6x + -76 = 0

Reorder the terms:
-76 + -6x + x2 = 0

Solving
-76 + -6x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '76' to each side of the equation.
-76 + -6x + 76 + x2 = 0 + 76

Reorder the terms:
-76 + 76 + -6x + x2 = 0 + 76

Combine like terms: -76 + 76 = 0
0 + -6x + x2 = 0 + 76
-6x + x2 = 0 + 76

Combine like terms: 0 + 76 = 76
-6x + x2 = 76

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 76 + 9

Reorder the terms:
9 + -6x + x2 = 76 + 9

Combine like terms: 76 + 9 = 85
9 + -6x + x2 = 85

Factor a perfect square on the left side:
(x + -3)(x + -3) = 85

Calculate the square root of the right side: 9.219544457

Break this problem into two subproblems by setting 
(x + -3) equal to 9.219544457 and -9.219544457.

Subproblem 1

x + -3 = 9.219544457 Simplifying x + -3 = 9.219544457 Reorder the terms: -3 + x = 9.219544457 Solving -3 + x = 9.219544457 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 9.219544457 + 3 Combine like terms: -3 + 3 = 0 0 + x = 9.219544457 + 3 x = 9.219544457 + 3 Combine like terms: 9.219544457 + 3 = 12.219544457 x = 12.219544457 Simplifying x = 12.219544457

Subproblem 2

x + -3 = -9.219544457 Simplifying x + -3 = -9.219544457 Reorder the terms: -3 + x = -9.219544457 Solving -3 + x = -9.219544457 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -9.219544457 + 3 Combine like terms: -3 + 3 = 0 0 + x = -9.219544457 + 3 x = -9.219544457 + 3 Combine like terms: -9.219544457 + 3 = -6.219544457 x = -6.219544457 Simplifying x = -6.219544457

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.219544457, -6.219544457}

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