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RE: 9994 Squared = 99 880 036 - Can you calculate this in your head? - Let me teach you how.
(A-B)2 = A2 -2AB+B2
9994 sqrd = (10,000 - 6)sqrd
Simple :-)
(A-B)2 = A2 -2AB+B2
9994 sqrd = (10,000 - 6)sqrd
Simple :-)
Well done @sebastian , You get it :P
Of course, Binomicus the Great!