x^2-3960x+3920400=0

Solution for x^2-3960x+3920400=0 equation:

Simplifying
x2 + -3960x + 3920400 = 0

Reorder the terms:
3920400 + -3960x + x2 = 0

Solving
3920400 + -3960x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(1980 + -1x)(1980 + -1x) = 0

Subproblem 1
Set the factor '(1980 + -1x)' equal to zero and attempt to solve:

Simplifying
1980 + -1x = 0

Solving
1980 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-1980' to each side of the equation.
1980 + -1980 + -1x = 0 + -1980

Combine like terms: 1980 + -1980 = 0
0 + -1x = 0 + -1980
-1x = 0 + -1980

Combine like terms: 0 + -1980 = -1980
-1x = -1980

Divide each side by '-1'.
x = 1980

Simplifying
x = 1980
Subproblem 2
Set the factor '(1980 + -1x)' equal to zero and attempt to solve:

Simplifying
1980 + -1x = 0

Solving
1980 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-1980' to each side of the equation.
1980 + -1980 + -1x = 0 + -1980

Combine like terms: 1980 + -1980 = 0
0 + -1x = 0 + -1980
-1x = 0 + -1980

Combine like terms: 0 + -1980 = -1980
-1x = -1980

Divide each side by '-1'.
x = 1980

Simplifying
x = 1980
Solution
x = {1980, 1980}