Question

Pics below pls help asap

Answer 1

• √n²

n is less than 0

but for any number square means greater than or equal to 0

Hence it's

• ±n

#2

• -√9y²
• -√3²y²
• ±3y

Answer 2

√n²=±n

-√9y²=±3y

is a required answer.