Question Number 139124 by 7770 last updated on 22/Apr/21
$${x}^{\mathrm{2}} +{x}−\mathrm{2}\sqrt{{x}}=\mathrm{36} \\ $$$$\boldsymbol{\mathrm{find}}\:\boldsymbol{\mathrm{x}} \\ $$
Answered by MJS_new last updated on 22/Apr/21
$$\mathrm{you}\:\mathrm{can}\:\mathrm{only}\:\mathrm{approximate}.\:\mathrm{I}\:\mathrm{get} \\ $$$${x}\approx\mathrm{5}.\mathrm{91193369} \\ $$
Answered by bramlexs22 last updated on 23/Apr/21
$$\mathrm{u}^{\mathrm{4}} +\mathrm{u}^{\mathrm{2}} −\mathrm{2u}−\mathrm{36}=\mathrm{0} \\ $$$$\mathrm{u}\:\approx\:\mathrm{2}.\mathrm{4314468} \\ $$$$\mathrm{x}\:\approx\:\mathrm{5}.\mathrm{9119351960} \\ $$