Describe the error in the work shown below.
find an expression equivalent to 18 + 30.
factors of 18: 1, 2, 3, 6, 9, 18
factors of 30: 1,2,3,5, 6, 10, 15, 30
18 + 30 = 6(3 + 10)

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.