27 February 2020 Sergiu Funieru The formula for (a + b + c)^2 [the square of a trinomial] 0 The formula for (a + b + c)^2 [the square of a trinomial] is: Have you seen this? 0
![The formula for (a + b + c)^2 [the square of a trinomial]](https://lunlun.com/wp-content/uploads/2020/02/The-formula-for-a-b-c^2-the-square-of-a-trinomial.png "The formula for (a + b + c)^2 [the square of a trinomial]")