Which shows the expressions rewritten with the least common denominator? 7x-2/4x2 and x-1/8x. 28x-8/16x and 2x2-2x/16x

Cis your correct answer

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.

So confused right here i need it to be more clearer