x^2-66x+7=0

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Solution for x^2-66x+7=0 equation:


Simplifying
x2 + -66x + 7 = 0

Reorder the terms:
7 + -66x + x2 = 0

Solving
7 + -66x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -66x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + -66x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -66x + x2 = 0 + -7
-66x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-66x + x2 = -7

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 = -7 + 1089

Reorder the terms:
1089 + -66x + x2 = -7 + 1089

Combine like terms: -7 + 1089 = 1082
1089 + -66x + x2 = 1082

Factor a perfect square on the left side:
(x + -33)(x + -33) = 1082

Calculate the square root of the right side: 32.893768407

Break this problem into two subproblems by setting 
(x + -33) equal to 32.893768407 and -32.893768407.

Subproblem 1

x + -33 = 32.893768407 Simplifying x + -33 = 32.893768407 Reorder the terms: -33 + x = 32.893768407 Solving -33 + x = 32.893768407 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 = 32.893768407 + 33 Combine like terms: -33 + 33 = 0 0 + x = 32.893768407 + 33 x = 32.893768407 + 33 Combine like terms: 32.893768407 + 33 = 65.893768407 x = 65.893768407 Simplifying x = 65.893768407

Subproblem 2

x + -33 = -32.893768407 Simplifying x + -33 = -32.893768407 Reorder the terms: -33 + x = -32.893768407 Solving -33 + x = -32.893768407 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 = -32.893768407 + 33 Combine like terms: -33 + 33 = 0 0 + x = -32.893768407 + 33 x = -32.893768407 + 33 Combine like terms: -32.893768407 + 33 = 0.106231593 x = 0.106231593 Simplifying x = 0.106231593

Solution

The solution to the problem is based on the solutions from the subproblems. x = {65.893768407, 0.106231593}

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