Answer
The answers are below.
Work Step by Step
We use numbers that are easy to square to obtain:
a) $20^2 - 2(20)(1) + 1^2 = 361$
b) $30^2 - 2(30)(1) + 1^2 = 841$
c) $50^2 - 2(50)(1) + 1^2 = 2401$
d) $80^2 - 2(80)(1) + 1^2 = 6241$
e) $40^2 - 2(40)(2) + 2^2 = 1444$
f) $60^2 - 2(60)(2) + 2^2 = 3364$