Question

simplify negative square root of 189

Answer 1

complex numbers wud help u

Answer 2

First, I would factor 189. See if you can find a perfect square factor.

Answer 3

do u know what is square root of -1

Answer 4

no?

Answer 5

@nancydiaz14 Have you learned about imaginary numbers yet?

Answer 6

there is a concept of i for root -1 hv u heard of it

Answer 7

no we barely started learning about square roots.

Answer 8

I think I am supposed to find the factor of 189

Answer 9

I would think that simplify means to factor out any perfect squares. For example:
\(\sqrt{12} = 2\sqrt{3}\) because 12 factors to 4 and 3. \(\sqrt{4} = 2\).

Answer 10

so could I factor it with 9 * 21 and then get -3 times the square root of 21?

Answer 11

That's where I'm not sure of. Not having been in your class, I can't be sure what your teacher is asking for. \(\sqrt{189} = \pm 3\sqrt{21}\). I think you are correct with the -3.