Answer :

konrad509
[tex]f(x)\cdot g(x)\cdot h(x)=\sqrt{x-1}\cdot(x^2+2)(x+3)=\\ =(x^3+3x^2+3x^3+9)\sqrt{x-1}=(4x^3+3x^2+9)\sqrt{x-1}[/tex]

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