Question

classify the following is rational or irrational

$(3 + \sqrt{23} ) - \sqrt{23}$
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Answer 1

(3 + √23) - √23

Solve the bracket we get

3 + √23 - √23 = 3

and 3 is a rational number so that (3 + √23) - √23 is a rational number

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Answer 2

Answer:

$</p><p>(3 + \sqrt{23} ) - \sqrt{23} \\ 3 + \sqrt{23} - \sqrt{23} = 3 \\ \\ so \: it \: is \: rational$