Whenever x is a positive integer and y is a negative integer, which of the following expression is always positive?
a- -x-y
b- (x+1)^2 +y
c- x^2-y^2
d- - y^2 / (-x-1)
e- y^3 / x^2
After trying different combinations I would think both a and c would be a positive
expression.
a- -x-y
b- (x+1)^2 +y
c- x^2-y^2
d- - y^2 / (-x-1)
e- y^3 / x^2
After trying different combinations I would think both a and c would be a positive
expression.
