n^2-2n=357

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Solution for n^2-2n=357 equation:


Simplifying
n2 + -2n = 357

Reorder the terms:
-2n + n2 = 357

Solving
-2n + n2 = 357

Solving for variable 'n'.

Reorder the terms:
-357 + -2n + n2 = 357 + -357

Combine like terms: 357 + -357 = 0
-357 + -2n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '357' to each side of the equation.
-357 + -2n + 357 + n2 = 0 + 357

Reorder the terms:
-357 + 357 + -2n + n2 = 0 + 357

Combine like terms: -357 + 357 = 0
0 + -2n + n2 = 0 + 357
-2n + n2 = 0 + 357

Combine like terms: 0 + 357 = 357
-2n + n2 = 357

The n term is -2n.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2n + 1 + n2 = 357 + 1

Reorder the terms:
1 + -2n + n2 = 357 + 1

Combine like terms: 357 + 1 = 358
1 + -2n + n2 = 358

Factor a perfect square on the left side:
(n + -1)(n + -1) = 358

Calculate the square root of the right side: 18.920887928

Break this problem into two subproblems by setting 
(n + -1) equal to 18.920887928 and -18.920887928.

Subproblem 1

n + -1 = 18.920887928 Simplifying n + -1 = 18.920887928 Reorder the terms: -1 + n = 18.920887928 Solving -1 + n = 18.920887928 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + n = 18.920887928 + 1 Combine like terms: -1 + 1 = 0 0 + n = 18.920887928 + 1 n = 18.920887928 + 1 Combine like terms: 18.920887928 + 1 = 19.920887928 n = 19.920887928 Simplifying n = 19.920887928

Subproblem 2

n + -1 = -18.920887928 Simplifying n + -1 = -18.920887928 Reorder the terms: -1 + n = -18.920887928 Solving -1 + n = -18.920887928 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + n = -18.920887928 + 1 Combine like terms: -1 + 1 = 0 0 + n = -18.920887928 + 1 n = -18.920887928 + 1 Combine like terms: -18.920887928 + 1 = -17.920887928 n = -17.920887928 Simplifying n = -17.920887928

Solution

The solution to the problem is based on the solutions from the subproblems. n = {19.920887928, -17.920887928}

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