Surds question

simplify fully the square root of 25/16
simplify fully the square root of 18 over the square root of 8

The answer would be 1.25 for the first one and 1.5 for the second one

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.