Can someone pls help? I need it urgently this is to do with the sine rule

5(2a-5+b). xbox xboxxbx xb

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.

X> -2 is the simplified version.