Question

please help problem is on attachment

Answer 1

no solution since the y-value of a square root function must be positive

Answer 2

\[-5\sqrt{x-9}-7=23\]

Answer 3

\[-5\sqrt{x-9}=30\]

Answer 4

\[\sqrt{x-9}=-6\]

Answer 5

The positive square root of a number cannot be negative. So just like moneybird said.

Answer 6

Couldnt it x be 27?

Answer 7

\[-5\sqrt{27-9}-7=23\]

Answer 8

Is that s true sentence?

Answer 9

Oops, i mean 45

Answer 10

\[-5\sqrt{45-9}-7=23\]

Answer 11

since the square root of 36 is 6 and -6

Answer 12

Is that true?

Answer 13

yes

Answer 14

But the symbol indicates the POSITIVE root of 36

Answer 15

what symbol?

Answer 16

how do you know it means principle square root?

Answer 17

Because it does not say +/-

Answer 18

oh, okay, that makes sense, thanks

Answer 19

What does "3" mean? Positive 3 or negative 3 or both?

Answer 20

I don't think that is related... I'm just saying that -6^2 and 6^2 both equal 36

Answer 21

It is related. the symbol does not indicate a sign so it is understood to be the positive root.

Answer 22

and also -6^2=-36 wheras (-6)^2=36

Answer 23

Oh wow, you are right, I immediately understood it to be positive, nice job. And you know i meant (-6)