The number under the 1. root sign must be greater than; =0, so 2-x > =0 and x-2 >; =0, so X=2, so Y=-3, XY=-6, and the square is 36;

2. Same as 1, because m

3. 236 under the root number is the result of multiplying 2.36 under the root number by 10 (because 236=2.36* 100), so the result is15.36; Similarly, 0.236 under the root sign is the result of dividing 23.6 under the root sign by 10, so the result is 0.4858;

The cube root of 4. -27 is -3, and the cube root of 18 under the radical sign is 18 under the fifth power of the radical sign, so the result is -3+ 18 under the fifth power of the radical sign.