This is because y is a factor of 5y and it's also a factor of y^2 = y*y
It's the largest common factor between the two given expressions.
Hello.
The highest common factor of
is
y is the greatest common factor (G.C.F.) also called the Highest Common Factor (HCF)
Therefore, y is the highest common factor of 5y and y².
I hope it helps.
Have a nice day.
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