Determine the value or values that are excluded from the following expression.
-$\frac { x ^ { 2 } - 25 } { 2 x ^ { 2 } - 5 x - 7 }$
A)-5, 5
B) $- 5 , - 1 , \frac { 7 } { 2 } , 5$
C) $- \frac { 7 } { 2 } , 1$
D) $- 1 , \frac { 7 } { 2 }$

Question

Quizplus · Accepted Answer

The values excluded from the expression are the roots of the denominator $2x^2 - 5x - 7$, since division by zero is undefined. Factoring or using the quadratic formula on $2x^2 - 5x - 7 = 0$ gives $x = -1$ and $x = \frac{7}{2}$.

Determine the Value or Values That Are Excluded from the Following