Math, asked by kriti0810, 3 months ago

find the product using the formula of (a+b)(a-b) = a²-b² :
21*19

Answers

Answered by Rashi0906

4

21*19

(20+1)(20-1)

20²-1¹

400-1

399

Thnx✌️✌️

Answered by sumaiya298

3

Step-by-step explanation:

(20+1)(20-1)=20²-1²=400-1=399

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