Question

Is the sum of 4.2 and the square root of 2 rational or irrational

Answer 1

The correct answer is:

Irrational.

Explanation:

We are adding a rational number, 4.2, and an irrational number, √2.

Adding an irrational number to anything makes the sum irrational.

The only way to get a rational number from an irrational number is to multiply or divide. There is no way to rationalize an irrational number by adding or subtracting.

Answer 2

Answer:

The given expression is irrational.

Step-by-step explanation:

We have been given an expression  $4.2+\sqrt{2}$

And we need to tell whether it is rational or irrational

Irrational numbers are those numbers which we can not write in simple fraction form

Rational numbers are those which can be written in fraction form both numerator and denominator should be integers.

The given expression can not be written in the form of simple fraction  and hence, the given expression is irrational.