Question

rational factor or irrational factor _4/5 2root15​

Answer 1

Answer:

$\frac{4}{5}+2\sqrt{5}$

We need to rationalize this .... So

$\frac{(\frac{4}{5}+2\sqrt{5})*(\frac{4}{5}-2\sqrt{5})}{\frac{4}{5}-2\sqrt{5}} \\\\=>\frac{\frac{16}{25}-20 }{\frac{4}{5}-2\sqrt{5} }$

Next solve like this

Step-by-step explanation: