Question

only 3rd one. I'll mark as brainliest

Answer 1

In 1st and 2nd question it is given that the sum of square root of outer 4 sides is equal to 18.,then in the 3rd you can use this formula = ( squareroot of 9 + square root of 64 + square root of 1,and the Middle term is given then you can find your answer as (18 - 3+8+1) = 6,you know that the no. Will be it's square = 36