Would the 0 be recommended, because without the zero, it would be: cosx-3+(cnos^2 x^2 -3nsx)i
Explanation: use the commutative property to reorder the terms, so it would equal to (nsxi+1)(cosx-3)
Then, multiply the parenthesis
“Multiply each term in the first parenthesis by each term in the second parenthesis(FOIL) so it equals to
nsxicosx-3nsxi+cosx-3
Then calculate the product, equals to cnos^2 x^2 i- 3nsxi+cosx-3”
Then factor out ‘i’ from the expression
(cnos^2 x^2 -3nsx)i+ cosx-3
Then, use the commutative property to reorder the terms, like this
cosx-3+(cnos^2 x^2 -3nsx)i
AND THATS THE SOLUTION WITHOUT THE “=0” part
cosx-3+(cnos^2 x^2 -3nsx)i
HOPE THIS HELPS| (• ◡•)|