Question

for what values of the variable is the rational expression undefined?
(a+3(a+4)
--------
(a-3)(a+4)

Answer 1

whenever you have zero in the denominator the expression is undefined

Answer 2

so what could you put in for a that would make the denominator 0?

Answer 3

its a fraction those pairs are over each other

Answer 4

its a fraction those pairs are over each other

Answer 5

its a fraction those pairs are over each other

Answer 6

correct

Answer 7

so the idea here to to look at it and decide which numbers you could put in for a so that you end up with zero in the denominator.