5x^2-2x^3-10 in simple form

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

What is the anwers for 9+2x=5x-3-x

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.