Math, asked by cutieepragya, 10 months ago

evaluate 69 × 71 ( by using algebraic method)

Answers

Answered by Shatadrugh2007

1

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Answered by kanaklatavermadelhi

1

Answer:

69×71

= (70-1)(70+1)

= (x-a)(x+a)=x²-a²

= (70)²-(1)²

= 4900-1

= 4899

This is the correct answer

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