Question

What is the domain of the function?Rotate the image to see it.

Answer 1

answer B is correct

Explanation:

Hello,

this is not allowed to divide by 0 so we need to find the zeros of

`x^2+2x-15=0`

`<=> x^2-3x+5x-15=0\\<=> x(x-3)+5(x-3)=0\\<=> (x+5)(x-3)=0\\<==> x=-5 \ \ or \ \ x=3`

we need x different from -5 and from 3

answer B is correct

hope this helps