Given a function f(x). Suppose that Newton's interpolating polynomial P 2(x) of f(x) at the points x 0 =−3,x 1 =1 and x 2 =2 is P 2 (x)=x 2 +x+2. Calculate f[x0 ,x 1 ].
a. 4 b. −4 c. −3 d. −1