Write the Word or Phrase That Best Completes Each Statement $\frac { 1 } { x ^ { 2 } + 1 }$

Short Answer

Write the word or phrase that best completes each statement or answers the question.
-y = $\frac { 1 } { x ^ { 2 } + 1 }$ Enter your answer exactly in the form: $\frac { \mathrm { P } ( \mathrm { x } ) } { ( \mathrm { Q } ( \mathrm { x } ) ) ^ { \mathrm { a } } }$ where P(x) and Q(x) are polynomials in standard form.