Find the x intercept of f (x) = (7x + 7) / (x^2+5)

Set this equation equal to zero. Then, set each factor equal to zero, and solve for x

7x+7=0

x^2+5=0

x=-1

x = + or - √-5

For this second answer, simplify this to + or - i√5.

Note that if you were to distribute this, the highest exponent would be 3. This tells you how many answers there will be:

-1

i√5

-i√5