Question

Short Answer.

The length of the side of a rectangular desk is given by 3x-y cm. The length of the front is given by 3x+ y cm. What is an algebraic expression for the area of the top of the rectangular desk? Include correct units as part of your answer.

Is the equation (3x-y)(3x+y)?

Answer 1

That is the correct equation,
9x^2 - y^2 cm^2

Answer 2

so you have to add the centimeters squared?

Answer 3

yup. even for an equation you have to add that.

Answer 4

(3x-y)(3x+y)
F= 3x*3x = 9x^2
O=3x*y=3xy
I=-y*3x= -3xy
L=-y*y=-y^2
=9x^2 +3xy-3xy-y^2
=9x^2-y^2

Answer 5

oh yeah
=9x^2-y^2 cm^2