Please help me with this first part with an explanation and the work you did to find the answer

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Sum is 17 and their difference is 3

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis