(square root-9) power of 2

[frozen scroll]

How does this equal 9? I never learned any of this.

[fleet storm]

1. Wait patiently for a helper to come along.
2. Once someone helps you, say thank you and close the thread with: ```diff
   +close

[delicate tiger]

what

[chrome comet]

@frozen scroll is this $\sqrt{-9}^2$ what you mean

[strong pollen]

Altair

[frozen scroll]

Yes

Wait up the - should be in the left

More left

[chrome comet]

??

Can you write it on paper and send a pic

[frozen scroll]

Yes

@chrome comet

Please ping me so I know when to respond

[chrome comet]

I don't think this is used. I think the n-th root definition is only for positive integers.

I guess you could say it is ((9)^(-1))^2=(1/9)^2=1/81

[solar pine]

If you mean (-sqrt(9))^2 it’s because it turns into (-1•sqrt(9))^2 = -1•sqrt(9)•-1•sqrt(9) or (-1)^2 • sqrt(9)^2 which is 1•9 or 9

Basically
x^2 = (-x)^2

However most people consider -x^2 (without parentheses) to be -(x^2)

As the negative is like multiplying by -1

[frozen scroll]

Ok thank you guys

!close

+close