human
Given the sketch of a curve in the form (x + a)(x + b), work out its factorised form Which of the following could be the equation of this curve? ![A graph of a quadratic curve that crosses the x axis at (1,0) and (3,0) and crosses the y axis at (0,3).]() \( y=(x+1)(x+3) \)
gpt
Forgets to swap the sign of roots when placing into brackets