Question

Please solve this question step by step explain kar dijiye

Answer 1

Answer: 1

Step-by-step explanation:

Observe this:

$(x+\sqrt{x^2-9} )(x-\sqrt{x^2-9} )\\ \\= (x)^2-(\sqrt{ x^2-9})^2$(∵ $(a+b)(a-b)=a^2-b^2$)

$= x^2-(x^2-9)\\\\= 9$

Matlab, $(x+\sqrt{x^2-9} )(x-\sqrt{x^2-9} ) =9$  hua ....

now,  put $x+\sqrt{x^2-9} = 9$ into this

$(9)(x-\sqrt{x^2-9} ) =9\\\\x-\sqrt{x^2-9} = 9/9 = 1$