Question

please answer this question

Answer 1

Step-by-step explanation:

this question's answer is option B

Answer 2

Answer:

A. x=6 is the positive root of the equation

Step-by-step explanation:

$\sqrt{2 {x}^{2} + 9 } = 9$

Take square on both sides

2x^2 +9 = 81

2x^2= 72

x^2= 36

x = +6 or x = -6

here positive root = +6