Question

What is 4 root 5 × 4 root 5
Plz fast

Answer 1

$4 \sqrt{5} \times 4 \sqrt{5}$
$= {(4 \sqrt{5}) }^{2}$
$= 80$

Answer 2

4√5*4√5=80.......4*4=16 and √5*√5=5. so when we multiply 16*5=80....hope it's useful!!