Algebra
posted by Emma .
The length of a side of a rectangle is 2 units less than a number, and the width is 4 units more than the length. Which of the following expressions represents the area of the rectangle, in square units?
A. x^2+2x+4
B. x^22x+8
C. x^24
D. x^2+4

Algebra 
Bosnian
x = a number
L = x  2
W = L + 4 = x  2 + 4 = x + 2
A = L * W =
( x  2 ) * ( x + 2 ) =
x ^ 2  2 ^ 2 =
x ^ 2  4
Answer C
_____________________________________
Remark:
( a  b ) ( a + b ) = a ^ 2  b ^ 2
_____________________________________
Respond to this Question
Similar Questions

basic geometric
10. a rectangle has width the same as a side of a square whose perimeter is 20m. the length of the rectangle is 9m. find the perimeter of this rectangle. 34. The width of a rectangular picture is onehalf the length. The perimeter … 
Math
answer to travis has designed a rectangle with an area of 59 square units. his rectangle is the smallest rectangle with whole number side lengths. what are the length and width of the rectangle, explain your reasoning. what is the … 
algebra
a rectangle with an area of 45 square units has a length that is one less then half the width which expression represents the length of the rectangle? 
math
The area of a rectangle is 532 square units. Find the length and the width of the rectangle. One side of the rectangle is x+5 and the other is x4 
math
A rectangle has a length of 6x+3 units and a width of 8 units. Write a simplified expression for the area, in square units, of this rectangle. So, my answer was 9x+8 please tell me is this correct... Thank you 
Geometry
The area of a rectangle is 2160 square units and the diagonal is 78 units long. What are the length and width of the rectangle? 
Math
The width of a rectangle is 3 units less than the length. If the area is 70 square units, then find the dimensions of the rectangle. 
Math
7.) Old McDonald wants to build a fence around his farm. If the area of his farmland is 400 square meters, what would the perimeter of the fence be? 
Algebra
A rectangle has a length of 5 and 1/2 units and an area of 132 square units. What is the width of the rectangle? 
math
The width of a rectangle is 3 units less than the length. The area of the rectangle is 28 units. What is the width, in units, of the rectangle?