What should be added to a²-2ab+b² to get a²-ab-2b² ​

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

M.xyz =radians. covert this radian measure to its equivalent measure in degrees.

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?