Aperfect square trinomial can be represented by a square model with equivalent length and width. which polynomial can be represented by a perfect square model? a. x2 – 6x + 9 b. x2 – 2x + 4 c. x2 + 5x + 10 d. x2 + 4x + 16

The correct answer is 


In fact, this is a trinomial of the form , whose solutions are given by

Using this formula for the trinomial of the problem, we find:

we see that this trinomial has two coincident solutions (x=3 with multiplicity 2). This means that it can be rewritten as a perfect square, in the following form: