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Question Number 138575 by KwesiDerek last updated on 15/Apr/21

$$\mathbf{find}\mathbf{x}$$$${\mathbf{x}}^2-2^{\mathbf{x}}=1$$$$\mathbf{Any}\mathbf{help}$$

Commented by soudo last updated on 15/Apr/21

$$$$$$\mathrm{soit}\mathrm{g}\left(\mathrm{x}\right)={\mathrm{x}}^2-1\mathrm{and}\mathrm{h}\left(\mathrm{x}\right)=2^{\mathrm{x}}$$$${\mathrm{x}}^2-1=2^{\mathrm{x}}$$$$\mathrm{g}\left(\mathrm{x}\right)=\mathrm{h}\left(\mathrm{x}\right)$$$$$$$$\mathrm{etudier}\mathrm{les}\mathrm{variation}\mathrm{de}\mathrm{g}\mathrm{et}\mathrm{h}\mathrm{puis}\mathrm{construire}$$$$\mathrm{leur}\mathrm{courbes}$$$$$$$$\mathrm{x}=-1,2$$

Commented by KwesiDerek last updated on 15/Apr/21

$$\mathrm{how}\mathrm{did}\mathrm{you}\mathrm{do}\mathrm{it}\mathrm{si}\overline{\mathrm{r}},\mathrm{can}\mathrm{you}\mathrm{expand}\mathrm{it}\mathrm{further}\mathrm{please}$$

Commented by mr W last updated on 15/Apr/21

$$thereisno‘‘{nice}^{″}exactmethod.$$$$youcan‘‘{see}^{″}thatx=3isasolution.$$$$othersolutionscanonlybeobtained$$$$approximately:$$$$x\approx -1.1983$$$$x\approx 3.4075$$$$x=3$$

Commented by KwesiDerek last updated on 15/Apr/21

$$\mathrm{can}\mathrm{I}\mathrm{have}\mathrm{the}\mathrm{step}\mathrm{by}\mathrm{step}\mathrm{solution}\mathrm{pls}$$

Commented by mr W last updated on 15/Apr/21

$$no.youcannotcalculatethesolution.$$

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