Question

Which of the following gives all of the sets that contain square root 9

Answer 1

Answer:

See below.

Step-by-step explanation:

You haven't given the list but  the square roots of 9 are 3 and -3.

Answer 2

Answer:

$\rightarrow \sqrt{9}=\sqrt{3 \times 3}\\\\=3$

$\rightarrow \sqrt{9}\\\\=\sqrt{-3 \times -3}\\\\=-3$

→Set that contain square root of 9 = {3, -3}

→The Meaning of square root is that when number multiplied by itself gives the original number.for example: 4 ×4=16 , so square root of 16 is 4.Similarly , -4 × -4=16

→So there are two square root of 16 which are 4 and -4.