math
posted by Dayana .
A gardener wants to create a rectangular garden with length of 8x  4y ft. and width of 5x + 9y ft. What is an algebraic expression for the area of the garden?

(8x4y)*(5x+9y)=5x*8x5x*4y+9y*8x9y*4y=
40x^220xy+72xy36y^2=
40x^2+52xy36y^2
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