What is the length of the hypotenuse

If the discriminant if a quadratic equation is 4 which statement describes the roots?

What is fraction that is equivalent to 3/8

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.