evaluate using identities (2021)^2 -(2020)^2
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Answer:
The value is = 4041
Step-by-step explanation:
Given:- (2021)^2 - (2020)^2
By using the identity,
a^2 - b^2 = (a + b) (a - b)
We get,
= (2021 + 2020) (2021 - 2020)
Now add,
(2021 + 2020) = 4041
Therefore,
= 4041 (2021 - 2020)
Now subtract,
(2021 - 2020) = 1
Therefore,
= 4041 × 1
= 4041
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