Answer:
Step-by-step explanation:
+x-20
use FOIL
(x - 4)(x+5)
x-4=0
x+5=0
4 and negative 5 are the factors
Answer:
Area of the flying saucer = 
Step-by-step explanation:
The Flying saucer is in the shape of a circle.

Area of the circular flying saucer= 
:
Area= 
Area of the flying saucer 
So, the area of the flying saucer is 
This appears to be just an expression we are simplifying, not an equation we are solving. I THINK you are saying that the expression looks like this:

If you rationalize the denominator, you would get this expression:

which, after simplifying, looks like this:

and that's as simple as I can see that one getting. You can't factor anything out of the denominator to cancel with the numerator, so I think you're as simple as you can get there!
3.2+4=7.2
6.6/2.2=3
3+7.2=10.2
10.2