Question

Express y²-16y+k as a perfect square.​

Answer 1

(y-4)(y+4)

Explanation:

When you factor the y^2 you need to factor the rest of your equation. Your K does not exist since it is a perfect square and there is no c. Then you square 16 which is 4 so you have (y-4) (y+4). Hope this helps :)