Question

using identity 391×391-291×291​

Answer 1

Answer:

391*391-291*291

391^2 - 291 ^ 2

(400-9)^2 - (300-9)^2

1600 + 81 - 7200 - 900 - 81 + 5400

1100

Step-by-step explanation:

identity = (a-b)^2

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