(4a - b)(2a - 3b) =

A 8a² + 3b²
B 8a² - 3b²
C 8a² - 10ab + 3b²
D 8a² - 14ab + 3b²

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.