x^2-40*x+625=0

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Solution for x^2-40*x+625=0 equation:


Simplifying
x2 + -40x + 625 = 0

Reorder the terms:
625 + -40x + x2 = 0

Solving
625 + -40x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-625' to each side of the equation.
625 + -40x + -625 + x2 = 0 + -625

Reorder the terms:
625 + -625 + -40x + x2 = 0 + -625

Combine like terms: 625 + -625 = 0
0 + -40x + x2 = 0 + -625
-40x + x2 = 0 + -625

Combine like terms: 0 + -625 = -625
-40x + x2 = -625

The x term is -40x.  Take half its coefficient (-20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
-40x + 400 + x2 = -625 + 400

Reorder the terms:
400 + -40x + x2 = -625 + 400

Combine like terms: -625 + 400 = -225
400 + -40x + x2 = -225

Factor a perfect square on the left side:
(x + -20)(x + -20) = -225

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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