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What is that least number that must be added to the product 684 × 686 to make it a perfect square?
- A685
- B1
- C684
- D686
Answer not set
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CCommunity
684 × 686 = 684 × (684 + 2) = 6842 + 2 × 684
To make it perfect square we should add 1
⇒ 6842 + 2 × 684 × 1 + 12 = (684 + 1)2
So ans is 1.
To make it perfect square we should add 1
⇒ 6842 + 2 × 684 × 1 + 12 = (684 + 1)2
So ans is 1.