Question

Answer my question for brainlist ^_^

Answer 1

Answer:

c

Step-by-step explanation:

c) real numbers is the correct answer hope it helps u and sorry i was not able to answer the 19th question

Answer 2

19) Answer : D)

Reasoning :

$x + \frac{1}{x} = p$

$(x + \frac{1}{x})^{2}  = p^{2} \\x^{2} + \frac{1}{x^{2} } + 2 = p^{2}  \\x^{2} + \frac{1}{x^{2} } = p^{2} - 2.......................(1)\\x-\frac{1}{x}  = A ( A\ is \ an\ unknown\ value)\\Squaring \ on \ both\ sides,\\  x^{2} + \frac{1}{x^{2} } - 2 = A^{2}\\A^{2} + 2 = x^{2} + \frac{1}{x^{2} } \\From \ (1) \ ,\\A^{2} + 2 = p^{2} - 2\\A^{2} = p^{2} - 4\\A = \sqrt{p^{2} - 4 }$

20) D) all of these