## Elementary Algebra

In order to solve this problem, we must choose two numbers that are easy to square: a) $20^2 + 2(20)(1) + 1^2 = 441$ b) $40^2 + 2(40)(1) + 1^2 = 1681$ c) $70^2 + 2(70)(1) + 1^2 = 5041$ d) $30^2 + 2(30)(2) + 2^2 = 1024$ e) $50^2 + 2(50)(2) + 2^2 = 2704$ f) $80^2 + 2(80)(2) + 2^2 = 6724$