yes it is an irrational number
No because 18 is a rational number
The square root of 18 is an irrational number because it cannot be expressed as a fraction.
No. √324 = 18 = 18/1 = a rational number.
The sum of a rational and irrational number must be an irrational number.
rational * irrational = irrational.
No, 3.56 is not an irrational number. 3.56 is rational.
The square root of 18 is an irrational number because it cannot be expressed as a fraction.
Yes
It is a rational number
It is neither because the square root of -18 is an imaginary number but the square root of 18 is irrational
The square root of (any number that isn't a perfect square) is irrational.
No. If you can write the number on paper, it's rational. -18 is the ratio of -18 to 1, and also the ratio of 18 to -1.
No. √324 = 18 = 18/1 = a rational number.
No. An irrational number cannot be expressed as a/b where a and b are integers, b not zero. 18 = 18/1 = 36/2 = -36/-2 etc.
18 and 20
Rational.
sqrt(18) = 3*sqrt(2) is an irrational number.
No. It can be written as a fraction, so it is rational.