Question

a(a-1)(a-2)(a-3)-120​

Answer 1

Step-by-step explanation:

we know 120=2×2×2×3×5

3 and 5 are primes and hence can't be factorised further.

we can convert 2×2×2 into (2) and (2×2)

it means it will be of form 2×3×4×5

So, a=2

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