What is the answer for this equation p=r+s-6

3x-x+2=4
P = t + r + s
P - r - s = t + r - r + s - s 
P - r - s = t

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.