10 pointswhat number needs to be added to both sides of the equation in order to complete the square? x^2+16x=18 enter your answers in the boxes. x2+16x+(blank)=18+(blank)

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.