Feruza Matyakubova wrote:sos!

plug in numbers.

sqrt (-x*|x|), and x has to be negative

let x = -3

sqrt (-(-3)*|-3|)

sqrt (3*3) = 3

3 = -X

we know x=-ve

|x| is always + ve

-ve(-x)(x)

root x^2

that is +/- x

we know x<0

remember theere cannot be square root of a neagtive value

so -x is the answer

Vishu

I thought i would be just X, because the stem says that x<0, so X is already negative.
- ngative X is positive.

im a bit confused here

OA is A

I thought i would be just X, because the stem says that x<0, so X is already negative.
- ngative X is positive.

im a bit confused here

u r right x is negative. When u evaluate the square root u get a positive number.

So the positive square root is nothing but -x.

Eg: positive square root 3

Like Vishu said x=-3 so if u get +3 as the answer from the square root evaluation is nothing but - (-3) = - (x) [SINCE WE TOOK X AS -3]

Hope this helps!

Feruza Matyakubova,

Good luck at your test. It is time to relax and kick back.

Best,

Thanks Logitech!
Thank you guys for your explanations!
Feruza