Compare the y intercept and the rates if change of the following items

What are the soultion(s) to the quadratic equation 40- x^2=0

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5

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