<p>someone do this algebraically?</p>
<p>y=2x-8 what is the minimum value product xy could be?</p>
<p>ok i figured out a way but it’s no algebraic is the answer -8? If so can someone still explain how to do it logically without something like guess and check? </p>
<p>THANKS</p>
<p>First, this should be posted in the AP forum.</p>
<p>Second, you’re correct.</p>
<p>Third, here’s how I did it:
y=2x-8
xy=N
x(2x-8)=N
N is minimum when its derivative = 0.
4x-8=0
x=2
y=-4
xy=-8</p>