Find all the possible values of the following expressions: `1/(x^2+2)` (ii) `1/(x^2-2x+3)` (iii) `1/(x^2-x-1)`

Find all possible values of the following expressions : sqrt(x^(2)-9)

Find all the possible values of the expression: 1/(x^2+2)

Find all the possible values of 1/x for x>3 .

Find all the possible the value of the following expression dot sqrt(x^2-4) (ii) sqrt(9-x^2) (iii) sqrt(x^2-2x+10)

Find all possible values of expressions (2+x^2)/(4-x^2)

Find all the possible values of f(x) =(1-x^2)/(x^2+3)

Find all the possible values of f(x) =(1-x^2)/(x^2+3)

Find all possible values of expression sqrt(1-sqrt(x^(2)-6x+9)).

Find all possible values of (x^2+1)/(x^2-2) .

IF x is real , find the signs of the each of the following expressions: 3x^2-2x+1