What is expand ((n+1)!(n+2))-1 ?

The solution to expand ((n+1)!(n+2))-1 is n(n+1)!+2(n+1)!-1

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expand ((n+1)!(n+2))-1

expand

((n + 1)! (n + 2)) - 1

n (n + 1)! + 2 (n + 1)! - 1

Solution steps

((n + 1)! (n + 2)) - 1

Remove parentheses:

(a) = a

= (n + 1)! (n + 2) - 1

Expand

(n + 1)! (n + 2) : n (n + 1)! + 2 (n + 1)!

= n (n + 1)! + 2 (n + 1)! - 1

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What is expand ((n+1)!(n+2))-1 ?
The solution to expand ((n+1)!(n+2))-1 is n(n+1)!+2(n+1)!-1