A system of equations and its solution are given below. System A To get system B below, the second equation in system A was replaced by the sum of that equation and the first equation in system A multiplied by -2. System B

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.

Ithink the answer is a.3: 1i hope this