If x and y are intergers greater than 1, is x a multiple of y?
2) (x^2)-x is a multiple of y
is x = ky?
condition 1: 3(y^2) + 7y = x
y(3y+7) = x
y is an integer hence 3y+7 is an integer. Let's say 3y+7=k then x = ky. Hence proved sufficient.
condition 2: (x^2)-x = ky
x = (k/x-1)*y k/x-1 is not an integer hence not sufficient
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