Answer:
Not necessary
Explanation:
Given that a binomial is multiplied by a trinomial.
A binomial means containing two terms normally
x+a
Trinomial is containing 3 terms may be
ax^2+bx+c
When we multiply we can get degree 3 also as shown above.
Hence the statement is false.
When a binomial is multiplied by a trinomial getting a product of degree 5 is only occasional and not always.