Question

The middle term of a perfect square trinomial is equal to _______________________.

Answer 1

see explanation

Explanation:

consider the expansion of a perfect square trinomial

(ax + b)² = a²x² + 2abx + b²

thus the middle term is twice the product of the inner and outer terms

Answer 2

The middle term of the trinomial is the sum of the products of the outer and inner terms of the binomials. The product of the last terms of each binomial is equal to the last term of the trinomial.