If (x-15)(x-3) < 0, which of the following must be true?	Pick:
A) x^2 + 5x + 6 < 0	B) x^2 + 5x + 6 > 0	C) 15 - x >0	D) x - 5 < 0	E) 11 - x > 0
(x-15)(x-3)&lt;0 can be written as (15-x)(x-3)&gt;0   So,to inequality hold true multiple of (15-x) and (x-3) must be positive and if I let both elements positive/negative then the range becomes 3<x<15 -="" 15="" answer="" x="">0hoice 15 - x &gt;0 matched which says 15-x&gt;0 or x&lt;15,which must be true (I started to look from E to A for making easy decision first)   15 - x &gt;0orrect Answer 15 - x &gt;0</x<15>
<result>C</result>
If (x-15)(x-3) < 0, which of the following must be true?