Re: MATH1131 help thread
If you want to square a number that ends in 5 you do this as a short cut (i'll show by example):
35^2 well 3 times 4 is 12, then just add 25 on the end = 1225.
45^2 well 4 times 5 is 20, add 25 to get 2025.
115^2 well 11 times 12 is 132, so answer is 13225.