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Answer :

Answer:

A1 =L W = s * s = original area

A2 = (s - 6) (s + 6)     area of new figure

A2 = s^2 -36       area of new figure

Note: a^2 - b^2 = (a - b) (a + b)

Check: Suppose the original square was 12 X 12

A1 = 144 and A2 = 18 * 6 = 108

Or 144 - 108 = 36

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