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If f(x)=x^2-81 and g(x)=(x-9)^-1(x 9), find g(x) * f(x)

2 Answers

3 votes
Hello,

if x≠9 then


f(x)=x^2-81\\\\ g(x)= (x+9)/(x-9) \\\\ g(x)*f(x)= ((x-9)(x+9)(x+9))/(x-9) =(x+9)^2=x^2+18x+81
User Petru Zaharia
by
7.0k points
7 votes
The answer choices are
A) (x+9)^2
B) (x-9)^2
C) 2(x+9)
D) (x+9)(x-9) So the answer would be A
User Ines
by
8.2k points

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