SOLUTION: find the area of a rectangle with length, l = 2x + 3 and width, w = 2x - 3 a. 4x2 b. 4x2 - 12x + 9 c. 4x2 - 9 d. 4x2 + 9

Algebra ->  Surface-area -> SOLUTION: find the area of a rectangle with length, l = 2x + 3 and width, w = 2x - 3 a. 4x2 b. 4x2 - 12x + 9 c. 4x2 - 9 d. 4x2 + 9       Log On


   



Question 69150: find the area of a rectangle with length, l = 2x + 3 and width, w = 2x - 3
a. 4x2
b. 4x2 - 12x + 9
c. 4x2 - 9
d. 4x2 + 9

Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
The area of a rectangle is given by:
A+=+L%2AW Substituting L = 2x+3 and W = 2x-3, you get:
A+=+%282x%2B3%29%282x-3%29 Perform the indicated multiplication and simplify.
A+=+4x%5E2+-9 ...and you're done!