URGENT ALGEBRA HELP PLZ...?!?!?

Question

for what value is x+1/x^2-5x-14 undefined?

a. (2, -7)

b. (-2, 7)

c. (2, 7)

d. (-2, -7)

Answer 1

x+1/x^2-5x-14 = (x+1)/(x-7)(x+2)

So B (-2,7) is undefined for x+1/x^2-5x-14

Answer 2

why don't you try plugging in all the values ? or if you're lazy heres a shortcut.

first factor out the denominator, you don't really need to look at the numerator since undefined means a zero in the denominator

x^2-5x-14 = (x-7)(x+2)

then look at your choices and see which numbers would make the solution zero

look at (x-7) first.  if x = 7 then the answer would be 0, therefore 7 is one of the solutions.

now look at (x+2).  if x = -2, then the answer would also be 0, therefore -2 is your other solution

now when x = 7 and -2 the statement would be undefined so B is your answer !

Answer 3

wow man. I was feeling pretty amazing about myself how i passed 8th grade math with an A. I was really proud of that. Thanks for making me feel miserable again.  

Answer 4

im pretty sure its b