Question

if y>0 then the square root of 25y^2-9y^2=?

Answer 1

4y

Answer 2

positive

Answer 3

@indianalexander
how 4y?

Answer 4

25y^2-9y^2 = 16y^2
root of 16y^2 = 4y

Answer 5

but she gave a condition. y>0
ok. let suppose y<0?

Answer 6

@indianalexander
let us suppose y<0.
then what will be the answer?

Answer 7

it will still be positive as the square of a negative number is positive

Answer 8

I know i know. but if 4y is the answer. then what about condition which given?