`#tnvt`
`(\frac{1-a\sqrt{a}}{1-\sqrt{a}}+\sqrt{a})(\frac{1-\sqrt{a}}{1-a})(x\ne1,x>=0)`
`=(\frac{(1-\sqrt{a})(1+\sqrt{a}+a)}{1-\sqrt{a}}+\sqrt{a})(\frac{1-\sqrt{a}}{(1-\sqrt{a])(1+\sqrt{a})})`
`=(1+\sqrt{a}+a+\sqrt{a}).\frac{1}{1+\sqrt{a}}`
`=\frac{(\sqrt{a}+1)^2}{1+\sqrt{a}}`
`=1+\sqrt{a]`