Question

which number is inrational?

81?

169?

156?

144?

Answer 1

do you mean?

√81

√169

√156

√144

Answer 2

Yes.

Answer 3

do you know your square numbers?

\[1\times1=1^2=1\\2\times2=2^2=4\\3\times3=3^2=9\\4\times4=4^2=16\\5\times5=5^2=25\\\qquad\vdots=\vdots~~=\quad\vdots\]

Answer 4

Yes Im just making sure. It's a test I really want to pass to bring my grade up.

Answer 5

the square root of a square number \[\sqrt{n^2}=n\]is than number
__
for example
\[\sqrt{25}=\sqrt{5^2}=5\]

Answer 6

Yes, so if whether in root is not a square number then it is irrational number.

Answer 7

Aye. OK. Thank you.

Answer 8

*Both.

Answer 9

You're welcome.