Asked by John
If x>0 and x=5y, then square root of x^2-2xy+y^2 is..
Answers
Answered by
drwls
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
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
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