Math, asked by siyasingh9979, 4 days ago

evaluate 69×71 using formula (a+b) (a-b)= (a2-b2)

Answers

Answered by PrathameshKukade

2

Answer:

4899

Step-by-step explanation:

=69×71

=(70-1)(70+1)

=70²-1²

=4899

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