A number theory problem by Moch. Reza Habibi

( 987654321 ) 2 987654322 × 987654320 (987654321)^2 - 987654322 \times 987654320

3 1 2 4

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1 solution

Vishal S
Feb 8, 2015

Let 987654321=a

(987654321)^2 - 987654322 x 987654320 =>a^2-(a+1)(a-1)

=>a^2-a^2+1

=>1

The answer was 0

Mahdi Islam - 6 years, 3 months ago

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How can you prove

Vishal S - 6 years, 3 months ago

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I have noticed that using calculator the answer is really 0

Munem Shahriar - 3 years, 11 months ago

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