What are the solutions to the system of equations graphed below

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares

Which of the following is the graph of y= square root -x-3