Q 17. The square of -9 is
(a) -81 (b) 81 (c) 18 (d) -18
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Q 17. The square of -9 is
(a) -81 (b) 81 (c) 18 (d) -18
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-9 x -9 = 81
when two negatives are multiplied , the product obtained is positive !
(-9)² = 81
hence ,
the ans is option (b)