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How would you square 69 in Roman numerals giving step by step instructions and clear reasons for your answer?
Today we would write out 69 in Roman numerals as LXIX but during the Roman era it was calculated as LXVIIII and by placing I to both sides of these numerals was probably simplified to ILXX (-1+70 = 69) in written form which made multiplication a lot easier because:-
-I*ILXX = +I -LXX
L*ILXX = -L+MMMD
X*ILXX = -X+DCC
X*ILXX = -X+DCC
Calculation: MMMMDCCCCI - CXXXX = MMMMDCCLXI or as (IV)DCCLXI which are both the eqivalent of 4761
Remember that a minus number multiplied by a minus number produces a positive number. So -I*-I = I
Roman numerals: M=1000, D=500, C=100, L=50, X=10, V=5 and I=1
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