How do i solve this cause it is hard

The answer is B

Step-by-step explanation:

This is to divide the factor already pulled out.

Use divided by to get +2x, again to use divided by to get +7.

For the 2nd group, since they pulled -2 out, you'll need to divide everything by -2. Use -4x divided by -2 get +7 and use -14 divided by -2 get +7

Therefore, the answer is +2x+7

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step-by-step explanation:

(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