Question

Which equation is represented by the model?

x2–2x-3 = (x – 3)(x + 1)
x2 - 4x + 3 = (x – 3)(x - 1)
x2 + 2x + 3 = (x + 3)(x - 1)
x2 + 4x – 3 = (x + 3)(x + 1)

Answer 1

The equation represented by the model is:

x2 - 2x- 3

Explanation:

the other person was right

Answer 2

The equation represented by the model is:

x2 - 2x- 3

Explanation:

It's like that because of the decomposition of the quadratic form.

We can resolve it by sum of their difference.