Question

plz help. ..........​

Answer 1

SOLUTION ☺️

x^2 -2ax+1=0

$= > \frac{ \sqrt{a} + 1 + \sqrt{a} - 1 }{ \sqrt{a} + 1 - \sqrt{a} - 1 } \times \frac{ \sqrt{a} + 1 - \sqrt{a} - 1 }{ \sqrt{a} + 1 + \sqrt{a} - 1 } \\ \\ = > \frac{( \sqrt{a } + 1) {}^{2} - ( \sqrt{a} - 1) {}^{2} }{( \sqrt{a} + 1) {}^{2} - ( \sqrt{a} - 1) {}^{2} } \\ \\ = > \frac{a + 1 - (a + 1)}{a + 1 - (a - 1)} \\ \\ = > \frac{a + 1 - a - 1}{a + 1 - a + 1} \\ \\ = > 0$

hope it helps ✔️