If

is the length and

the width, then

.
Since the area of the rectangle is

you have

Factoring the left hand side gives

Obviously the width can't be negative, so

. This means D is the answer, since it's the only option with this measure.
Answer:
Step-by-step explanation:
A. m<BED = 90°
b. axis
c. AB
d. 9
e. E ~ AB
Lets see,
6c to the second power is 36c because 6c times 6c is 36 c
And since the variables are different and only one number doesn't have a variable,
The answer would be, 36c-5d+8