Simplify: −3(4x + 5)(2x + 4)

24x^2+78x-60

Step-by-step explanation:

−3(4x + 5)(2x + 4)

-3(4x)+(-3*5)= -12x+-15

(-12x+-15)(2x + 4)

F- -24x^2

o- -48x

i- -30x

l- -60

24x^2+78x-60

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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step-by-step explanation:

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