evaluate (101.5)²-(100.5)²

Answer 1

https://www.google.com/search?source=hp&ei=3YQvXdOjNda4tQbyorrQDw&q=%28101.5%29%C2%B2-%28100.5%29%C2%B2+%3D+&oq=%28101.5%29%C2%B2-%28100.5%29%C2%B2+%3D+&gs_l=psy-ab.3..33i299l2.3600.11828..12553...2.0..0.188.1106.2j7......0....2j1..gws-wiz.....0.ofo_mm_wYZ4

Answer 2

(101+.5)^2 - (101-.5)^2
((101+.5) + (101-.5))((101+.5) - (101-.5))
(202)(1) = 202