# Exercise Solution 2.2

Formula [2.26] provides a quadratic polynomial approximation *p*_{2}(** x**) for the function

*f*(

**):**

*x*[2.26]

We have

[s1]

and

[s2]

Valuing *f*, *f*, and ^{2}*f* at **x**^{[0]} = (0, 0), we obtain

[s3]

[s4]

[s5]

Substituting these into [2.26], our result is

[s6]

[s7]