Solve A, B, and C

1. Consider the family of curves described by: x1 + xy + ay2 = b. Remember to justify your answers. A. Let :1 =1 and b = 7. Find the two x-intercepts. B. Let :1 =1 and b = 7. Using the two points you found in part A, show that the tangents to the curve at these points are parallel, and find the common slope. C. A given curve in the family .1:2 + xy + ayz =b has a tangent line at point (1, 3) with slope ' What are the values of a and b