Question

If a = (3+✓5)/2 solve a^2 + (1/a^2)

Answer 1

55+21root2/14+6root5 willl be ur ans...........

Answer 2

$\frac{1}{a} =( 3 - \sqrt{5} )\div 2 \\ \\ a + \frac{1}{a} = \frac{3 + \sqrt{5} }{2} + \frac{3 - \sqrt{5} }{2}$

$= 3$

square on both sides

${a}^{2} + \frac{1}{ {a}^{2} } + 2 = 9$

${a}^{2} + \frac{1}{ {a}^{2} } = 9 - 2$

=7

mark it as brainliest answer