English, asked by jnsjanbababa, 9 months ago

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

Answers

Answered by Anonymous
0

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.

Answered by random15
0

Answer:

22^2-21^2

using the identity a^2-b^2=(a+b)(a-b)

(22+21)(22-21)

43×1

43

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