What is the completely factored form of this polynomial? 5x4 + 20x3 - 105x2
OA. 5x2(x+3)(x - 7)
B.
5x2(x + 3)(x - 7)
OC. 5x2(x - 3)(x + 7)
OD. 5x3(x - 3)(x + 7)

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

c. (3,2,6) is the answer.

it is x equals 3   plese mark me really need it

step-by-step explanation:

thats not a system of equations, that is a solution