\(\left(x-3\right)\left(x^2+3x+9\right)=98\)
\(x^3-3^3=98\)
\(x^3-27=98\)
\(x^3=125\)
\(x^3=5^3\)
\(x=3\)
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\(\left(x-3\right)\left(x^2+3x+9\right)=98\)
\(x^3-3^3=98\)
\(x^3-27=98\)
\(x^3=125\)
\(x^3=5^3\)
\(x=3\)