Question

Question 1 (ii)
Classify $(3+\sqrt{23})-\sqrt{23}$ as rational or irrational.

Answer 1

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

It is a rational number as it can represented in $\frac{p}{q}$ form.