Category: Algebra

Question Number 130802 by shaker last updated on 29/Jan/21 Answered by TheSupreme last updated on 29/Jan/21 $$Assumingch=cosh$$$$3cosh\left(2x\right)-sinh\left(2x\right)-3=0$$$$\mathrm{3}\left(\frac{{e}^{\mathrm{2}{x}} +{e}^{−\mathrm{2}{x}} }{\mathrm{2}}\right)−\frac{{e}^{\mathrm{2}{x}} −{e}^{−\mathrm{2}{x}} }{\mathrm{2}}=\mathrm{3}…

Question Number 65198 by kaivan.ahmadi last updated on 26/Jul/19 $$leta\in {\mathbb{R}}^{+},andx>0$$$$x^4+(1-2a)x^2-2ax+1=0$$$$findx$$ Commented by MJS last updated on…

Question Number 130719 by SLVR last updated on 28/Jan/21 $$$$ Commented by SLVR last updated on 28/Jan/21 Commented by SLVR last updated on…

Question Number 65115 by hovea cw last updated on 25/Jul/19 $${\mathrm{x}}^{\mathrm{x}}=64$$$$\mathrm{find}\mathrm{x}$$ Answered by mr W last updated on 25/Jul/19 $${x}^{{x}}…

Question Number 65087 by Tawa1 last updated on 25/Jul/19 Answered by MJS last updated on 25/Jul/19 $$\mathrm{easier}\mathrm{than}\mathrm{it}\mathrm{seems}$$$$\left(1\right)x+y+z=0\Rightarrow z=-x-y$$$$\mathrm{insert}\mathrm{this}\mathrm{in}\left(2\right)\mathrm{and}\left(3\right)$$$$\left(2\right)-3xy(x+y)=18$$$$\left(\mathrm{3}\right)\:\:−\mathrm{7}{xy}\left({x}+{y}\right)\left({x}^{\mathrm{2}}…