Answer:
Rational
Step-by-step explanation:
Simplifying;
[tex]=(5+\sqrt{4} )(5-\sqrt{4} )\\\\=5(5-\sqrt{4} )+\sqrt{4} (5-\sqrt{4} )\\\\=25-5\sqrt{4}+ 5\sqrt{4}-4\\\\=25-4\\\\=21[/tex]
On simplifying the expression we get 21. And 21 is is a rational number because on converting into p/q form we get 21/1. Here both 21 and 1 are rational number. So given expression is rational.
