x^2-20x-97=0

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Solution for x^2-20x-97=0 equation:


Simplifying
x2 + -20x + -97 = 0

Reorder the terms:
-97 + -20x + x2 = 0

Solving
-97 + -20x + 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 + -20x + 97 + x2 = 0 + 97

Reorder the terms:
-97 + 97 + -20x + x2 = 0 + 97

Combine like terms: -97 + 97 = 0
0 + -20x + x2 = 0 + 97
-20x + x2 = 0 + 97

Combine like terms: 0 + 97 = 97
-20x + x2 = 97

The x term is -20x.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20x + 100 + x2 = 97 + 100

Reorder the terms:
100 + -20x + x2 = 97 + 100

Combine like terms: 97 + 100 = 197
100 + -20x + x2 = 197

Factor a perfect square on the left side:
(x + -10)(x + -10) = 197

Calculate the square root of the right side: 14.035668848

Break this problem into two subproblems by setting 
(x + -10) equal to 14.035668848 and -14.035668848.

Subproblem 1

x + -10 = 14.035668848 Simplifying x + -10 = 14.035668848 Reorder the terms: -10 + x = 14.035668848 Solving -10 + x = 14.035668848 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = 14.035668848 + 10 Combine like terms: -10 + 10 = 0 0 + x = 14.035668848 + 10 x = 14.035668848 + 10 Combine like terms: 14.035668848 + 10 = 24.035668848 x = 24.035668848 Simplifying x = 24.035668848

Subproblem 2

x + -10 = -14.035668848 Simplifying x + -10 = -14.035668848 Reorder the terms: -10 + x = -14.035668848 Solving -10 + x = -14.035668848 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = -14.035668848 + 10 Combine like terms: -10 + 10 = 0 0 + x = -14.035668848 + 10 x = -14.035668848 + 10 Combine like terms: -14.035668848 + 10 = -4.035668848 x = -4.035668848 Simplifying x = -4.035668848

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.035668848, -4.035668848}

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