Question

Please answer the above question.​

Answer 1

Answer:

square root and sqare gets cancelled

i.e. +3-4

so +3-4= -1

OR

-3-4= -7

Answer 2

165

Step-by-step explanation:

$\sqrt{(13)^{2} } - (2) ^{2} \\ (13 + 2)(13 - 2) \\ (15)(11) \\ 165$

Formula = (a)² - (b)²

= ( a + b ) ( a - b )