Answer:
ok so the shaded area will be the larger rectange minus the smaller one so lets find the area of both by multiplying the sides
(5x)(8x+1)=40x^2+5x
(4x)(2x)=8x^2
so
40x^2+5x-8x^2
32x^2+5x or
x(32x+5)
so a
Hope This Helps!!!
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