89 multiply by 99 multiply by 89 solve using properties
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Answer:
89*89*99
=(90-1)(90-1)*(100-1)
=(90-1)² * (100-1)
=[90²+1²-2*90*1]*(100-1)
=[8100+1-180]*(100-1)
=7921*(100-1)
=7921*100 - 7921*1
=792100-7921
=784179
Step-by-step explanation:
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