Simplify $\frac { a ^ { 2 } - b ^ { 2 } } { a ^ { 2 } + b ^ { 2 } }$

question 8

Short Answer

Simplify:
$\frac { a ^ { 2 } - b ^ { 2 } } { a ^ { 2 } + b ^ { 2 } }$

---

Definitions:

Acquired Active Immunity

Immunity developed through exposure to pathogens or through vaccination, leading to the production of antibodies.

Natural Passive Immunity

Immunity acquired by a newborn through transfer of antibodies from the mother, either through the placenta or breast milk.

Pertussis Vaccination

Immunization designed to protect against pertussis (whooping cough), a highly contagious respiratory disease.

Whooping Cough

An infectious bacterial disease that causes uncontrollable, violent coughing and a distinctive "whooping" sound upon inhalation.