math
posted by layth .
x.y=30 and x+y=10.3, I end up with
x=(21.83+60.66i)/(5.155.89i).
i is the square root of (1).
could you please show me how this equation will = 10.3
I am having problem to figure it out.
thank you.

math 
MathMate
It is a similar problem of having a rectangle of area 30 units and the semiperimeter is 10.3.
Using calculus, we find that the minimum real semiperimeter is 2√30=10.95.
Unless you are working with complex numbers, there is a good chance that there is erroneous data in the question. Did you derive the data (like 10.3) from an experiment, or was it calculated from some other sources? 
math 
layth
my Teacher gave this problem

math 
MathMate
Ask the teacher if he/she expects complex roots, which are approx. 5.15±1.86i.

math 
layth
if my teacher expects complex roots, what will be the final answer if i add x+y = 10.3 = ??
thank you 
math 
MathMate
If
x=5.15+1.86i
y=5.151.86i
xy=29.98
x+y=10.3
Note that numerical values are rounded (except 5.15).
Do the multiplication as an exercise.
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