What is the value of the discriminant for the quadratic equation –3 = –x2 + 2x?

discriminant = b2 – 4ac

–8
4
8
16

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Choose the more precise measurement. 26.4 cm or 8.39 cm