Question

Subtract the square of 21 from the square of 22 without actually calculating the squares. ​

Answer 1

Answer:

Given,

We need to Subtract the square of 21 from the square of 22 without actually calculating the squares.

Using the formula

${x}^{2} - {y}^{2} = (x + y)(x - y)$

We get....

$= > {(22)}^{2} - {(21)}^{2} \\ = > (22 + 21)(22 - 21) \\ = > 43 \times 1 \\ = > 43.$

Answer 2

Answer:

Hello mate✌✌✌

${(22)}^{2} - {(21)}^{2} \\ {(22 - 21)}^{2} \\ {(22)}^{2} + {(21)}^{2} - 2.22.21 \\ 484 + 441 - 924 \\ 925 - 924 \\ 1$