If l5 represents a rotation and dilation, calculate the amount of rotation and the scale factor from the formula
for l5. do your numbers agre with your estimate in part (b)? if not, explain why there are no values of a and
b so that l5(x, y) = (aa− b, bx + aa).

Don’t know sorry girl

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.