Add or subtract (4x^2-2x-1)-(-3x^3+2)

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

Ibelieve it's a. 2.2 - x = -10.85 (plz tell me if it's right : ) )