Evaluate 99^2 by using the identity a^2+b^2=(a+b)(a-b).
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Answers
Answered by
2
Step-by-step explanation:
99²=9801
(99²+0²)=(99+0)(99-0)
=9801
Answered by
2
Step-by-step explanation:
99^2 = (100 - 1)^2
= 1002 + 12 - 2×1×100
{(x-a)2 = x^2+a^2-2ax }
= 100×100 + 1×1 - 200
= 10000 + 1 - 200
= 10001 - 200
= 9801
So, 992 = 9801
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