Factor 2x2 - 10x + 8 completely. a. 2(x + 2)(x - 2)
b. 2(x-2)(x + 4)
c. 2(x - 1)(x-4)

The correct answer is -4

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.