a^2-4a+25=

Solution for a^2-4a+25= equation:

Simplifying
a2 + -4a + 25 = 0

Reorder the terms:
25 + -4a + a2 = 0

Solving
25 + -4a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + -4a + -25 + a2 = 0 + -25

Reorder the terms:
25 + -25 + -4a + a2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -4a + a2 = 0 + -25
-4a + a2 = 0 + -25

Combine like terms: 0 + -25 = -25
-4a + a2 = -25

The a term is -4a.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4a + 4 + a2 = -25 + 4

Reorder the terms:
4 + -4a + a2 = -25 + 4

Combine like terms: -25 + 4 = -21
4 + -4a + a2 = -21

Factor a perfect square on the left side:
(a + -2)(a + -2) = -21

Can't calculate square root of the right side.

The solution to this equation could not be determined.