Question Number 91599 by john santu last updated on 01/May/20
Commented by mr W last updated on 01/May/20
$${x}=\mathrm{0}\:{is}\:{a}\:{solution}. \\ $$$${since}\:\frac{{d}\left({LHS}\right)}{{dx}}>\frac{{d}\left({RHS}\right)}{{dx}}=\mathrm{4}, \\ $$$${x}=\mathrm{0}\:{is}\:{also}\:{the}\:{only}\:{one}\:{solution}. \\ $$