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Evaluate 111 two 2 - 101 two 2 - WAEC Mathematics 2003 Question

Evaluate \((111_{two})^2 - (101_{two})^2\)

A
10two
B
100two
C
1100two
D
11000two
correct option: d

\((111_{2})^2 - (101_{2})^2\)

Difference of two squares

\((111 - 101)(111 + 101)\)

= \((10)(1100)\)

= \(11000_{2}\)

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