Evaluate 20 three 2 - 11 three 2 in base three - WAEC Mathematics 2001 Question
Evaluate \((20_{three})^2 - (11_{three})^2\) in base three
A
101
B
121
C
202
D
2020
correct option: c
\((20_{three})^2 - (11_{three})^2\)
= \((20_{3} - 11_{3})(20_{3} + 11_{3})\)
= \((2_{3})(101_{3})\)
= \(202_{3}\)
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