Math, asked by gursewaksingh4, 8 months ago

Evaluate - 69×71 Using (a² -b²)​

Answers

Answered by JENNY2007
6

Answer:

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Step-by-step explanation:

Answer:69 x 71(70-1) * (70+1 )using (a+b)( a - b)= a square + b square=(70) square +(1)sqaure=4900+1=4901.

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