Simplify the Complex Fraction $\frac { \frac { - 2 } { x } - \frac { 4 } { x + 2 } } { \frac { 7 } { x ^ { 2 } + 2 x } + \frac { 7 } { x } }$

question 277

Short Answer

Simplify the complex fraction. $\frac { \frac { - 2 } { x } - \frac { 4 } { x + 2 } } { \frac { 7 } { x ^ { 2 } + 2 x } + \frac { 7 } { x } }$

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Definitions:

Behavioral Isolation

A form of reproductive isolation where two populations develop differences in courtship rituals or behaviors that prevent them from mating.

Mating Signals

Behavioral, physical, or chemical signals used by animals to attract or communicate with potential mates.

Courtship

A period during which individuals of many species perform specific behaviors to attract mates.

Gametic Isolation

A prezygotic reproductive barrier where gametes (egg and sperm) from different species are unable to fuse and form a viable zygote.