Exercises

Please complete each exercise or answer the question before reviewing the posted solution comments.

Define a function that computes the polynomial: y = Ax² + Bx + C and test it with some known values for A, B, C, and x. Define your function so that it works on scalars for the values of A, B, and C and a vector of x values.

Define it so that this call will return the value of y as described by the polynomial above when A, B, C, and x are correctly defined.
```
          >> yValue = my_quadratic_poly(A,B,C,x)
```
This table shows some of the results your function should return. Test the function that you defined with these constants and x values.

y = Ax² + Bx + C

y A B C x

1 0 0 1 10

201 2 0 1 10

-169 -2 3 1 10

2 -1 -8 -19 -34 -2 3 1 [1:5]
Here's the function definition.
```
        function y = my_quadratic_poly(A,B,C,x)
        y = A* x.^2 + B*x + C;        
```
Use your calculator to confirm that each quadratic polynomial was evaluated correctly. Here's the code that calls the function. Then, compare each result against the correct value.
```
        >> my_quadratic_poly(0, 0, 1,10)
	
	ans =
	
	     1
	
	>> my_quadratic_poly(2, 0, 1,10)
	
	ans =
	
	   201
	
	>> my_quadratic_poly(-2, 3, 1,10)
	
	ans =
	
	   -169
	
        >> my_quadratic_poly(-2,3,1,[1:5])

        ans =

           2    -1    -8   -19   -34
	
        >> 
        
```