In the trinomial x^2 + 5x + 6, where does the first term x^2 come from when the trinomial is written as a product of two binomials?

1. This rule explains that the first term of the trinomial comes from multiplying the first terms of the two binomial factors. 2. For x squared, each binomial must start with x, since x times x gives x squared. 3. The last term instead comes from multiplying the last terms of the binomials, and the middle term comes from adding the outer and inner products. _Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 7 "Factoring", section 7.2 Factor Quadratic Trinomials with Leading Coefficient 1_