x^2-8x-97=0

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Solution for x^2-8x-97=0 equation:


Simplifying
x2 + -8x + -97 = 0

Reorder the terms:
-97 + -8x + x2 = 0

Solving
-97 + -8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '97' to each side of the equation.
-97 + -8x + 97 + x2 = 0 + 97

Reorder the terms:
-97 + 97 + -8x + x2 = 0 + 97

Combine like terms: -97 + 97 = 0
0 + -8x + x2 = 0 + 97
-8x + x2 = 0 + 97

Combine like terms: 0 + 97 = 97
-8x + x2 = 97

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 97 + 16

Reorder the terms:
16 + -8x + x2 = 97 + 16

Combine like terms: 97 + 16 = 113
16 + -8x + x2 = 113

Factor a perfect square on the left side:
(x + -4)(x + -4) = 113

Calculate the square root of the right side: 10.630145813

Break this problem into two subproblems by setting 
(x + -4) equal to 10.630145813 and -10.630145813.

Subproblem 1

x + -4 = 10.630145813 Simplifying x + -4 = 10.630145813 Reorder the terms: -4 + x = 10.630145813 Solving -4 + x = 10.630145813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 10.630145813 + 4 Combine like terms: -4 + 4 = 0 0 + x = 10.630145813 + 4 x = 10.630145813 + 4 Combine like terms: 10.630145813 + 4 = 14.630145813 x = 14.630145813 Simplifying x = 14.630145813

Subproblem 2

x + -4 = -10.630145813 Simplifying x + -4 = -10.630145813 Reorder the terms: -4 + x = -10.630145813 Solving -4 + x = -10.630145813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -10.630145813 + 4 Combine like terms: -4 + 4 = 0 0 + x = -10.630145813 + 4 x = -10.630145813 + 4 Combine like terms: -10.630145813 + 4 = -6.630145813 x = -6.630145813 Simplifying x = -6.630145813

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.630145813, -6.630145813}

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