x^2-6x-27=-1

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Solution for x^2-6x-27=-1 equation:


Simplifying
x2 + -6x + -27 = -1

Reorder the terms:
-27 + -6x + x2 = -1

Solving
-27 + -6x + x2 = -1

Solving for variable 'x'.

Reorder the terms:
-27 + 1 + -6x + x2 = -1 + 1

Combine like terms: -27 + 1 = -26
-26 + -6x + x2 = -1 + 1

Combine like terms: -1 + 1 = 0
-26 + -6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '26' to each side of the equation.
-26 + -6x + 26 + x2 = 0 + 26

Reorder the terms:
-26 + 26 + -6x + x2 = 0 + 26

Combine like terms: -26 + 26 = 0
0 + -6x + x2 = 0 + 26
-6x + x2 = 0 + 26

Combine like terms: 0 + 26 = 26
-6x + x2 = 26

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 = 26 + 9

Reorder the terms:
9 + -6x + x2 = 26 + 9

Combine like terms: 26 + 9 = 35
9 + -6x + x2 = 35

Factor a perfect square on the left side:
(x + -3)(x + -3) = 35

Calculate the square root of the right side: 5.916079783

Break this problem into two subproblems by setting 
(x + -3) equal to 5.916079783 and -5.916079783.

Subproblem 1

x + -3 = 5.916079783 Simplifying x + -3 = 5.916079783 Reorder the terms: -3 + x = 5.916079783 Solving -3 + x = 5.916079783 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 = 5.916079783 + 3 Combine like terms: -3 + 3 = 0 0 + x = 5.916079783 + 3 x = 5.916079783 + 3 Combine like terms: 5.916079783 + 3 = 8.916079783 x = 8.916079783 Simplifying x = 8.916079783

Subproblem 2

x + -3 = -5.916079783 Simplifying x + -3 = -5.916079783 Reorder the terms: -3 + x = -5.916079783 Solving -3 + x = -5.916079783 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 = -5.916079783 + 3 Combine like terms: -3 + 3 = 0 0 + x = -5.916079783 + 3 x = -5.916079783 + 3 Combine like terms: -5.916079783 + 3 = -2.916079783 x = -2.916079783 Simplifying x = -2.916079783

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.916079783, -2.916079783}

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