Question

n(n-3)=18. Solve for n.

Answer 1

hope it will help you....

Answer 2

n=6 , n= -3

n(n-3)=18

n^-3n=18

n^-3n-18=0

n^-6n+3n-18=0 [ by factorisation]

n(n-6)+3(n-6)=0

(n-6),(n+3)=0

n-6=0,n+3=0

n=6,n= -3