x^2-16x-27=

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Solution for x^2-16x-27= equation:


Simplifying
x2 + -16x + -27 = 0

Reorder the terms:
-27 + -16x + x2 = 0

Solving
-27 + -16x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -16x + 27 + x2 = 0 + 27

Reorder the terms:
-27 + 27 + -16x + x2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -16x + x2 = 0 + 27
-16x + x2 = 0 + 27

Combine like terms: 0 + 27 = 27
-16x + x2 = 27

The x term is -16x.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16x + 64 + x2 = 27 + 64

Reorder the terms:
64 + -16x + x2 = 27 + 64

Combine like terms: 27 + 64 = 91
64 + -16x + x2 = 91

Factor a perfect square on the left side:
(x + -8)(x + -8) = 91

Calculate the square root of the right side: 9.539392014

Break this problem into two subproblems by setting 
(x + -8) equal to 9.539392014 and -9.539392014.

Subproblem 1

x + -8 = 9.539392014 Simplifying x + -8 = 9.539392014 Reorder the terms: -8 + x = 9.539392014 Solving -8 + x = 9.539392014 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = 9.539392014 + 8 Combine like terms: -8 + 8 = 0 0 + x = 9.539392014 + 8 x = 9.539392014 + 8 Combine like terms: 9.539392014 + 8 = 17.539392014 x = 17.539392014 Simplifying x = 17.539392014

Subproblem 2

x + -8 = -9.539392014 Simplifying x + -8 = -9.539392014 Reorder the terms: -8 + x = -9.539392014 Solving -8 + x = -9.539392014 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = -9.539392014 + 8 Combine like terms: -8 + 8 = 0 0 + x = -9.539392014 + 8 x = -9.539392014 + 8 Combine like terms: -9.539392014 + 8 = -1.539392014 x = -1.539392014 Simplifying x = -1.539392014

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.539392014, -1.539392014}

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