Dylan uses the expressions (x2 - 2x + 8) and (2x2 + 5x - 7) to represent the length and width of his bedroom. Which expression represents the area (lw) of Dylan's room?
A. 2x^4-10x-56
B. 2x^4+10x+56
C. 2x^4+x^3-x^2+54x-56
D. 2x^4+9x^3+33x^2+54x+56
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