Guys, Help me, and an explanation would also be nice, please.

Find the roots of the equation below. x^2 - 6 + 9 = 0

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares