(x + 3)(2 x -1) what is the product?

2x^2 + 5x -3

Step-by-step explanation:

(x+3)(2x - 1) = 2x^2 - x + 6x - 3

                   = 2x^2 + 5x -3

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

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