(169)^2 - (168)^2 =	Pick: A) 1 B) 100 C) 229 D) 329 E) 337
Using the formula:   (a+1)^2 - a^2 = 2a+1   So, Answer = 168*2 + 1   = 336+1= 
<gadget id="calculator">336+1</gadget>
<output>337</output>
337= Answer = 337
<result>E</result>
(169)^2 - (168)^2 =