math help me!!
posted by alexis on .
is square root of 56 a rational number? explain uranswer using what you know about rational and irrational numbers.
thnx alot!

No, it is not rational.
sqrt(56)=sqrt(4*14)=sqrt(4*2*7)
sqrt2, sqrt 7 are irrational. The only square roots that are rational are squares of rational numbers.