x^2-170x-172=0

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Solution for x^2-170x-172=0 equation:


Simplifying
x2 + -170x + -172 = 0

Reorder the terms:
-172 + -170x + x2 = 0

Solving
-172 + -170x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '172' to each side of the equation.
-172 + -170x + 172 + x2 = 0 + 172

Reorder the terms:
-172 + 172 + -170x + x2 = 0 + 172

Combine like terms: -172 + 172 = 0
0 + -170x + x2 = 0 + 172
-170x + x2 = 0 + 172

Combine like terms: 0 + 172 = 172
-170x + x2 = 172

The x term is -170x.  Take half its coefficient (-85).
Square it (7225) and add it to both sides.

Add '7225' to each side of the equation.
-170x + 7225 + x2 = 172 + 7225

Reorder the terms:
7225 + -170x + x2 = 172 + 7225

Combine like terms: 172 + 7225 = 7397
7225 + -170x + x2 = 7397

Factor a perfect square on the left side:
(x + -85)(x + -85) = 7397

Calculate the square root of the right side: 86.005813757

Break this problem into two subproblems by setting 
(x + -85) equal to 86.005813757 and -86.005813757.

Subproblem 1

x + -85 = 86.005813757 Simplifying x + -85 = 86.005813757 Reorder the terms: -85 + x = 86.005813757 Solving -85 + x = 86.005813757 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '85' to each side of the equation. -85 + 85 + x = 86.005813757 + 85 Combine like terms: -85 + 85 = 0 0 + x = 86.005813757 + 85 x = 86.005813757 + 85 Combine like terms: 86.005813757 + 85 = 171.005813757 x = 171.005813757 Simplifying x = 171.005813757

Subproblem 2

x + -85 = -86.005813757 Simplifying x + -85 = -86.005813757 Reorder the terms: -85 + x = -86.005813757 Solving -85 + x = -86.005813757 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '85' to each side of the equation. -85 + 85 + x = -86.005813757 + 85 Combine like terms: -85 + 85 = 0 0 + x = -86.005813757 + 85 x = -86.005813757 + 85 Combine like terms: -86.005813757 + 85 = -1.005813757 x = -1.005813757 Simplifying x = -1.005813757

Solution

The solution to the problem is based on the solutions from the subproblems. x = {171.005813757, -1.005813757}

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