Question

CALLING ALL MATHS GENIUSES

If you can't see it in the pic it says: The length of the rectangle is x+9 cm. The width of the rectangle is x - 1 cm. Form an expression for the area of the rectangle. THANKS FOR YOUR ANSWERS. HELP IS MUCH APPRECIATED. :)

Answer 1

Area is length times width
(X+9)(X-1)
X^2+8x-9

Answer 2

Got you. So we will use the basic formula for the area of a rectangle and insert variable values. (^_^)

Area= Width(Height) ----------- Insert values of width and height [width = (x-1)
, height = (x+9)]

Area= (x-1)(x+9) ) -------------- Then expand if needed?
= x² +8x -9