Evaluate: $\frac { - x - 8 } { x ^ { 2 } - 4 x - 12 } \text { for } x = - 4$
A) $- \frac { 3 } { 5 }$
B) $- \frac { 1 } { 5 }$
C) $\frac { 1 } { 5 }$
D) $- \frac { 1 } { 2 }$

Name: Evaluate: $\frac { - x - 8 } { x ^ { 2 } - 4 x - 12 } \text { for } x = - 4$ A) $- \frac { 3 } { 5 }$ B) $- \frac { 1 } { 5 }$ C) $\frac { 1 } { 5 }$ D) $- \frac { 1 } { 2 }$
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Question

Quizplus · Accepted Answer

Substituting $x = -4$ into the expression gives $\frac{-(-4) - 8}{(-4)^2 - 4(-4) - 12} = \frac{4 - 8}{16 + 16 - 12} = \frac{-4}{20} = -\frac{1}{5}$.

Evaluate −x−8x2−4x−12 for x=−4\frac { - x - 8 } { x ^ { 2 } - 4 x - 12 } \text { for } x = - 4x2−4x−12−x−8​ for x=−4

Evaluate $\frac { - x - 8 } { x ^ { 2 } - 4 x - 12 } \text { for } x = - 4$