HELPPP ASAPPP I HAVE A PICTURE ABOVE

b and d

Step-by-step explanation:

3 + root 2 = 4.414...

30/root 19 = 6.882

5.1 - (15/root 24) = 2.038

4pi = 12.5663

b and d

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18