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Question

Simplify 128×58.

A
608
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B
108
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C
6016
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D
178
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Solution

The correct option is A 608
We know, for non-zero integers 'a' and 'b' and any integer 'm',
am×bm=(a×b)m

Comparing the given expression 128×58 with the LHS of the above mentioned equation, we have
a = 12, b = 5 and m = -8.

128×58 = (12×5)8=608

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