Is -3.25 rational or irrational?

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Answer 1 · 2018-02-22T20:55:19

rational

A number is irrational if it is being multiplied by #sqrt(-1)=i#.

Answer 2 · 2018-02-22T21:04:48

#-3.25 = -13/4# is rational

A number is rational if and only if it can be expressed in the form #p/q# for some integers #p# and #q#.

We find:

#-3.25 * 4 = -13#

So:

#-3.25 = -13/4" "# is rational.