Qn two: n2 - (n+a)(n-a)=a2
326541829^2-326541833*326541825
=326541829^2-(326541829+4)(326541829-4)
= 4^2
=16
By the way, the root qn, no need to put +/- in front of the
root
P.S for some unknown reason, the calculator shows zero everytime i
key in the sum above. does anyone has a explanation.
