If x is negative and y is positive, which of the following must be positive? Choose the most appropriate option.
A) x/y	B) xy	C) 2y + x	D) (x + y)^2 + 1	E) 3x/y
A. x/y   -ve/+ve=-ve   will be negative   B. xy   -ve*+ve= -ve   will be negative   C. 2y + x   might be positive or negative . The sign will be depend on the absolute values of x and y . The expression will be positive if 2y&gt;x   D. (x + y)^2 + 1   = (x+y)^2 will be positive irrespective of the absolute values of x and y   will be positive always   E. 3x/y   =- ve/ +ve   will be negative   Answer (x + y)^2 + 1
<result>D</result>
If x is negative and y is positive, which of the following must be positive?