Question

help

Answer 1

@Mehek14

Answer 2

which restriction is appropriate for the variable?

Answer 3

@agent0smith

Answer 4

Is the answer -4?

Answer 5

well a basic rule is that you can't divide by zero...

so the restriction is the value of a that makes the denominator zero

so to find it just solve

a + 4 = 0

the answer is the value that a can't take

in this case the restriction is a point of discontinuity

so it depends on what you are up to in your course...

you can factor the numerator and maybe find a common factor...

if the denominator can be removed with a common factor then there may be no restriction

Answer 6

@campbell_st

"if the denominator can be removed with a common factor then there may be no restriction"
that's not true since even if you can cancel off a common factor, the restriction still applies to the original expression