Question

(2+√5)(2+√5) expression is rational, irrational no, wholeno. Natural no

Answer 1

$(2 + \sqrt{5} )(2 + \sqrt{5} )$

${(2 + \sqrt{5} )}^{2}$

${2}^{2} + \sqrt{5 {}^{2} } + 2.2. \sqrt{5}$

$4 + 5 + 4 \sqrt{5}$

$9 + 4 \sqrt{5}$

$= irrational \: number$