(161)^2 - (162)^2 =
Pick one:
A) 1 B) 100 C) 229 D) 325 E) 349
Using the formula:   (a+1)^2 - a^2 = 2a+1   So, Answer = 162*2 + 1   = 324+1= 
<gadget id="calculator">324+1</gadget>
<output>325</output>
325= Answer = 325
<result>D</result>
(161)^2 - (162)^2 =