Substitute 5y for x and see what you get.
25y^2 -10y^2 + y^2 = 16 y^2
What is the square root of that?
It is 4y. It could also be -4y
y can be any positive number
If x>0 and x=5y, then square root of x^2-2xy+y^2 is..
1 answer
1 answer