No because the square root of 81 is 9 which is a rational number
Chat with our AI personalities
It can be a rational number or an irrational number. For example, sqrt(2)*sqrt(50) = 10 is rational. sqrt(2)*sqrt(51) = sqrt(102) is irrational.
Sqrt(2) and sqrt(3)
No. sqrt(8) is irrational sqrt(2) is irrational but sqrt(8) /sqtr(2) = sqrt(4) = ±2 is not irrational.;
phi = [1+sqrt(5)]/2 sqrt(5) is irrational and so phi is irrational.
sqrt(2) + sqrt(3) is irrational.