Question

$5 sqrt[4]{81} +2 sqrt[3]{125} - sqrt[5]{243}- sqrt{49}$

Answer 1

$sqrt[4]{81}$ = 3
$sqrt[3]{125}$ = 5
$sqrt[5]{243}$ = 3
$sqrt{49}$ = 7
5 × 3 + 2 × 5 - 3 - 7 = 15 + 10 - 3 - 7 =15

Answer 2

$5 sqrt[4]{81} +2 sqrt[3]{125} - sqrt[5]{243} - sqrt{49} =5*3+2*5-3-7= \ =15+10-3-7=15+10-10=15$