Express in rational expression: `(3x^2-x-4)/(9x^2-16)`

Find the range of rational expression y =(x^(2) -x+4)/(x^(2) +x+4) is x is real.

Express each of the following as a rational expressions. (x^2-5x+6)/(x^2-9x+20) div( x^2-3x+2)/(x^2-5x+4) :

Reduce the rational expression (x^(2)-16)/(x^(2)+8x+16) to its lowest form.

Express each of the following as a rational expression. (x^(2)-5x+6)/(x^(2)-9x+20)+(x^(2)-3x+2)/(x^(2)-5x+4):

If x be real then find the range of the following rational expressions (i) y=(x^(2)+x+1)/(x^(2)+1) (ii) y=(x^(2)-2x+9)/(x^(2)+2x+9)

Q.If x be real,then find the range of the following rational expressions (i) (x^(2)+x+1)/(x^(2)+1) (i) y=(x^(2)-2x+9)/(x^(2)-2x-9)

The rational expression (2x^(4)-162)/((x^(2)+9)(2x-6)) in its lowest terms is: