Question

$\sqrt[4]{81} +8 \sqrt[3]{216} + \sqrt{225}$

Answer 1

Prime factorisation of 

81 = 3*3*3*3

216 = 2*2*2*3*3*3

225= 5*5*3*3

Now on simplifying

4√81 +8∛216 +√225

3 +8*6 +15

3+48+15

66