Factor completely −3x3 + 12x2.

A. −x(3x2 − 12x)
B. −3x2(x − 4)
C. 3x(−x2 + 4x)
D. 3x2(−x + 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.