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Evaluate the following using suitable identities |
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Answer» Answer: you can USE the formula of ( a+b)³ &( a-b)³ 1) (100-1)³ (100)³-(1)³-3(100*1)(100-11) 1000000-1-300(100-1) 1000000-1-30000+300 1000000-1-29700 970300-1 970299 2) (100+2)³ = (100)3 + (2)3 + 3(100)(2)(100 + 2) = 1000000 + 8 + 600(100 + 2) = 1000000 + 8 + 60000 + 1200 =1061208 3)(1000-2)³ = (1000)3 - (2)2 - 3( 1000)(2)( 1000 - 2) = 1000000000 -8 - 6000(1000 - 2) = 1000000000 - 8 - 6000000 + 12000 = 994011992. 4)(1000+1 )³ HOPE YOU CAN SOLE LAST ONE YOURSELF.... |
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