Lucy found that a solution of x = − 4 was extraneous for her function. what would be a possible denominator in lucy's function?
x^2 +3x-4
x^2 -9
x+5
x-4

A solution is extraneous when the denominator of the function becomes zero when the solution is substituted.

Equating each of the options to 0:
x^2 +3x-4 = 0
x = 1 and -4

You can check the other options but they won't result to having a solution of x=-4

Therefore, the possible denominator of the function is x^2 +3x-4

50 % is the answer !