What is the soulution of x^2 + 64 = 0

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.

Find the maximum value of p= 4x + 5y subject to the following constraints :

If you apply the changes below to the linear parent function f(x)=x what is the equation of the new function vertically stretched by a factor of 3 flip over the x axis