If x is an integer and (x)(x^2)(x^3) is positive, which of the following could be negative?	Select.
A) x^4	B) (x)(x^3)	C) (x)(x)	D) x + x^3	E) 3x^2
Assuming) x is negative (makes it easier)   (-2)(-2^2)(-2^3)   (-2)^3.(-2)^3   The two negative numbers will remain negative, so they will both cancel out.   So we need an equation where x^n with n being odd.   a) not sufficient -&gt; will always be positive   b) not sufficient -&gt; equals x^4 which will always be positive   c) not sufficient -&gt; equals x^2 which will always be positive   d) -2+-8 = -10!!!   e) 3*4=12 is positive (pemdas!)   Answer is x + x^3
<result>D</result>
If x is an integer and (x)(x^2)(x^3) is positive, which of the following could be negative?