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Answer:

Refer to attachment

Hope it helps you siso........

Answer:

I explaining u by taking 1st one as example

here 3^2 is sum of 2(only two not it's square and 2nd wala 2 not third) + 1^2

and 3rd 2^2 is 3 minus 1

is last 3rd question

3rd no is 21-1 =20

in last 2d question

2nd no is 31-5^2 = 6

in last question

4rt no is 6^2 + 7 =43 and 3rd no is 43 -1 =42