Without finding the square of number evaluate 86^2-85^2
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Answered by
0
Answer:
the answer is 200500
I hope this will help y
Answered by
4
Answer:
171
Explanation: (n + 1)^2 - (n)^2 = 2n + 1 (n = 85)
(86)^2 - (85)^2 = 2 * 85 + 1
= 170 + 1
= 171
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