If y = x^2 + cx + d, y is minimum when x is: Choose the correct choice from the following options
A) c/d	B) -c/d	C) -c/2	D) -d/2	E) d/c
We're given the equation Y = X^2 + cX + d.   IF.. we use a simple Classic Quadratic....   c = 2   d = 1   Y = X^2 + 2X + 1   We can then go about finding the answer that yields the MINIMUM result when X = ...   Answer A: c/d = 2/1= 
<gadget id="calculator">2/1</gadget>
<output>2</output>
2 --&gt; 4+4+1= +9   Answer B: -c/d = -2/1 = -2 --&gt; 4-4+1 = +1   Answer -c/2: -c/2 = -2/2 = -1 --&gt; 1-2+1 = 0   Answer D: -d/2 = -1/2 --&gt;(1/4)-1+1 = +1/4   Answer E: d/c = 1/2 --&gt; (1/4)+1+1 = +2 1/4   From these results, we can see the minimum result:   -c/2
<result>C</result>
If y = x^2 + cx + d, y is minimum when x is: