Answer:
Step-by-step explanation:
You can use the formula:
.
You could also use foil:
First: 2x(2x)=4x^2
Outer: 2x(-5)=-10x
Inner: -5(2x)=-10x
Last: -5(-5)=25
--------------------------Add.
42
Choice C
5 Thousand + 15 hundred = 6500