Question

no unnessesqry ans plzzzz ......................​

Answer 1

Step-by-step explanation:

a)

${a}^{2} + {b}^{2} + 2ab = {(a + b)}^{2}$

put values

25+2(3)= (a+b)^2

31=(a+b)^2

$a + b = \sqrt{31}$

Answer 2

HERE IS YOUR ANSWER

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IF IT IS WRONG THEN SORRY