Question

what is the difference of 22 ^2 and
21 ^2​

Answer 1

Answer:

The answer is 43

Step-by-step explanation:

Required difference $=22^2-21^2$

                                  $=(22+21)(22-21)$, since $a^2-b^2=(a+b)(a-b)$

                                  $=43(1)\\=43$

Answer 2

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