Question

????sıɥʇ ǝʌlos zld




............ plz​

Answer 1

Explanation:

ANSWER:-

Let us first take the constant y.

$\dfrac{1}{9 + 4 \sqrt{5} }$

So, we will Rationalize it.

$\dfrac{1}{9 + 4 \sqrt{5} } \times \dfrac{9 - 4 \sqrt{5} }{9 - 4 \sqrt{5} }$

$= \frac{9 - 4 \sqrt{5} }{81 - 80} = 9 - 4 \sqrt{5}$

Now, x+y will be

$9 + \cancel{4 \sqrt{5}} + 9 \cancel{ - 4 \sqrt{5} }$

$= 18$

x-y

$9 + 4 \sqrt{5} - 9 + 4 \sqrt{5} = 8 \sqrt{5}$

${x}^{2} - {y}^{2} = (x + y)(x - y)$

$= 8 \sqrt{5} \times 18$

$= 144 \sqrt{5}$

${(x + y)}^{2}$

$= {(18)}^{2}$

$= 324$

are the answers.

Answer 2

Answer:

sorrry sana for disturbing u.....