Question

find the value of
399²-398²​

Answer 1

Answer:

$399 {}^{2} - 398 {}^{2} \\ a {}^{2} - b {}^{2} ={ a + b}{a - b} \\ = 399 + 398 \: \: {399 - 398} \\ = 797 \times 1 \\ = 797ans$

Answer 2

Answer:

797 is answer

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