x^2-26x-98=0

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Solution for x^2-26x-98=0 equation:


Simplifying
x2 + -26x + -98 = 0

Reorder the terms:
-98 + -26x + x2 = 0

Solving
-98 + -26x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '98' to each side of the equation.
-98 + -26x + 98 + x2 = 0 + 98

Reorder the terms:
-98 + 98 + -26x + x2 = 0 + 98

Combine like terms: -98 + 98 = 0
0 + -26x + x2 = 0 + 98
-26x + x2 = 0 + 98

Combine like terms: 0 + 98 = 98
-26x + x2 = 98

The x term is -26x.  Take half its coefficient (-13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
-26x + 169 + x2 = 98 + 169

Reorder the terms:
169 + -26x + x2 = 98 + 169

Combine like terms: 98 + 169 = 267
169 + -26x + x2 = 267

Factor a perfect square on the left side:
(x + -13)(x + -13) = 267

Calculate the square root of the right side: 16.340134638

Break this problem into two subproblems by setting 
(x + -13) equal to 16.340134638 and -16.340134638.

Subproblem 1

x + -13 = 16.340134638 Simplifying x + -13 = 16.340134638 Reorder the terms: -13 + x = 16.340134638 Solving -13 + x = 16.340134638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = 16.340134638 + 13 Combine like terms: -13 + 13 = 0 0 + x = 16.340134638 + 13 x = 16.340134638 + 13 Combine like terms: 16.340134638 + 13 = 29.340134638 x = 29.340134638 Simplifying x = 29.340134638

Subproblem 2

x + -13 = -16.340134638 Simplifying x + -13 = -16.340134638 Reorder the terms: -13 + x = -16.340134638 Solving -13 + x = -16.340134638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = -16.340134638 + 13 Combine like terms: -13 + 13 = 0 0 + x = -16.340134638 + 13 x = -16.340134638 + 13 Combine like terms: -16.340134638 + 13 = -3.340134638 x = -3.340134638 Simplifying x = -3.340134638

Solution

The solution to the problem is based on the solutions from the subproblems. x = {29.340134638, -3.340134638}

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