a^2-2a+15=0

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Solution for a^2-2a+15=0 equation:


Simplifying
a2 + -2a + 15 = 0

Reorder the terms:
15 + -2a + a2 = 0

Solving
15 + -2a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + -2a + -15 + a2 = 0 + -15

Reorder the terms:
15 + -15 + -2a + a2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -2a + a2 = 0 + -15
-2a + a2 = 0 + -15

Combine like terms: 0 + -15 = -15
-2a + a2 = -15

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

Add '1' to each side of the equation.
-2a + 1 + a2 = -15 + 1

Reorder the terms:
1 + -2a + a2 = -15 + 1

Combine like terms: -15 + 1 = -14
1 + -2a + a2 = -14

Factor a perfect square on the left side:
(a + -1)(a + -1) = -14

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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