Question

Without actually find the vlaue
21²- 20². don't use identity ​

Answer 1

Step-by-step explanation:

41

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Answer 2

41 is the required value for 21² - 20²

Step-by-step explanation:

Given:

21² - 20²

To find:

The value of 21² - 20² without squaring it.

Algebraic Identity used:

(a² - b²) = (a + b) (a - b)

Finding the value of 21² - 20²:

➙ (21² - 20²)

➙ (21 + 20) (21 - 20)

➙ (41) × (1)

➙ 41

Conclusion:

Hence, the value of (21² - 20²) is 41.