Answer:

Step-by-step explanation:
Simplify the radical by breaking the radicand up into a product of known factors.
Like this :
11 days for the second question
(x,y)
(2,1)
sub 2 for x and 1 for y and see if you get a true statemtn
2=x
y=1
1=1-2
1=-1
false
no it is not a soluiton
21 is greater cause it whole number
Just count the amount of each letter and write it as a exponent = 3x²y³