But how do I find out these two calculations below without using a calculator?
The points you have to check to know which are largest and smallest are: . To determine which is largest perform the same operations on this triple. First multiple each by 2: . Now square each one: . Subtract 4 from each one: . And square again: . We see that that 1st point is the smallest, 3rd point is in between, and 2nd point is largest.