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Rational function points of discontinuity

g(x)=x+3x2+2x3g(x)=\dfrac{x+3}{x^2+2x-3}
At each of the following values of xx, select whether gg has a zero, a vertical asymptote, or a removable discontinuity.
 
Zero
Vertical Asymptote
Removable Discontinuity
x=3x=-3
x=1x=1