861 = n(n + 1) \2 . Factorise
Answers
Answered by
1
Answer:
n(n+1)/2=861
=>n^2+n-1722=0
=>n^2+42n-41n-1722=0
=>n(n+42)-41(n+42)=0
=>(n-41)(n+42)=0
Either,
n-41=0 or n+42=0
=>n=41 =>n= -42
Answered by
1
Answer:
(n-42) (n+42)
Step-by-step explanation:
n(n+1) /2=861
=> n²+n-1722=0
=> n²+42n-41n-1722
=> n(n+42)-41(n+42) =0
=> (n-42) (n+42)
HOPE IT WILL HELP YOU :-
Similar questions