+128406 The denominator cannot = 0
So...set the denominator = 0 to find the x values that are excluded from the domain
So we have
x^2 + 2x - 3 = 0 factor
(x + 3) ( x - 1) = 0
Set each factor to 0 and solve for x and we get that
x = -3 and x = 1
And these are the two values excluded from the domain
[ Second and third answers ]
