How do you solve the equation 7x2(squared)-64=0

Mr switzer needs to buy new 1-foot tiles to cover his bathroom floor. the floor is 12 feet long and 8 feet wide. each square foot of tile will cost $1.79. in dollars what will be the total cost of the tiles he needs to buy.

Pls will give brainliest and all p.s u can zoom in if u cant see plss

One integer is 8 times another. if the product is 72, then find the integers