Question

What is the root of this a^2-2a+15=0

Answer 1

a = 1 ±i√14

Explanation:

Subtract 14.

a^2 -2a +1 = -14

(a -1)^2 = -14

Take the square root.

a -1 = ±√-14 = ±i√14

Add 1.

a = 1 ±i√14 . . . . . these are the complex roots of your equation