Find the domain of each function. $$f(x)=\frac{2 x+7}{x^{3}-5 x^{2}-4 x+20}$$
Added by Jose Luis M.
Step 1
So we solve the equation: $$x^{3}-5 x^{2}-4 x+20=0$$ This can be factored as: $$(x-2)(x-2)(x+5)=0$$ So the values of x that make the denominator zero are x=2 and x=-5. Show more…
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