6^4− 4^4 = ?	Choose one:
A) 20 B) 52 C) 104 D) 520 E) 1040
We can write the above in terms of   (a+b) (a-b)   6^4−4^4= (6^2)2 - (4^2)2 = (6^2−4^2)*(6^2+4^2) =   (36−16)*(36+16) =&gt; 20*52= 
<gadget id="calculator">20*52</gadget>
<output>1_040</output>
1040   Ans option 1040.
<result>E</result>
6^4− 4^4 = ?