Jena has a triangular garden with a perimeter that can be represented by 25r^2-9r+14. The sum of two sides of the garden is represented by 10r^2+12r+9 . Which expression represents the length of the third side?

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.