x^2+66x-528=0

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Solution for x^2+66x-528=0 equation:


Simplifying
x2 + 66x + -528 = 0

Reorder the terms:
-528 + 66x + x2 = 0

Solving
-528 + 66x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '528' to each side of the equation.
-528 + 66x + 528 + x2 = 0 + 528

Reorder the terms:
-528 + 528 + 66x + x2 = 0 + 528

Combine like terms: -528 + 528 = 0
0 + 66x + x2 = 0 + 528
66x + x2 = 0 + 528

Combine like terms: 0 + 528 = 528
66x + x2 = 528

The x term is 66x.  Take half its coefficient (33).
Square it (1089) and add it to both sides.

Add '1089' to each side of the equation.
66x + 1089 + x2 = 528 + 1089

Reorder the terms:
1089 + 66x + x2 = 528 + 1089

Combine like terms: 528 + 1089 = 1617
1089 + 66x + x2 = 1617

Factor a perfect square on the left side:
(x + 33)(x + 33) = 1617

Calculate the square root of the right side: 40.211938526

Break this problem into two subproblems by setting 
(x + 33) equal to 40.211938526 and -40.211938526.

Subproblem 1

x + 33 = 40.211938526 Simplifying x + 33 = 40.211938526 Reorder the terms: 33 + x = 40.211938526 Solving 33 + x = 40.211938526 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-33' to each side of the equation. 33 + -33 + x = 40.211938526 + -33 Combine like terms: 33 + -33 = 0 0 + x = 40.211938526 + -33 x = 40.211938526 + -33 Combine like terms: 40.211938526 + -33 = 7.211938526 x = 7.211938526 Simplifying x = 7.211938526

Subproblem 2

x + 33 = -40.211938526 Simplifying x + 33 = -40.211938526 Reorder the terms: 33 + x = -40.211938526 Solving 33 + x = -40.211938526 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-33' to each side of the equation. 33 + -33 + x = -40.211938526 + -33 Combine like terms: 33 + -33 = 0 0 + x = -40.211938526 + -33 x = -40.211938526 + -33 Combine like terms: -40.211938526 + -33 = -73.211938526 x = -73.211938526 Simplifying x = -73.211938526

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.211938526, -73.211938526}

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