Whats is the only solution of 2x2+8x2-16?

Can someone pls me i really need like asap

Acollege is planning to construct a rectangular parking lot on land bordered on one side by a highway. the plan is to use 680 feet of fencing to fence off the other three sides. what dimensions should the lot have if the enclosed area is to be a maximum?

What is 32+4 x (16 x 1/2) -2 show your work}