The revenue for selling x newspapers is given by the expression x^3+10x . The cost to produce x newspapers is 7x^2-2x . If profit is calculated as revenue minus​ costs, write an​ expression, in factored​ form, that calculates the profit from selling x newspapers.

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.