<PRE><B>Question 280710</B>
X*2X=2X^2 is the original dimensions of the cardboard.
W*L*H=VOLUME
W=(x-2*2)=x-4 in.
L=(2x-2*2)=2x-4 in.
H=2 in.
(x-4)(2x-4)*2=896
2(2x^2-8x-4x+16)=896 divide by 2
2x^2-12x+16=448
2x^2-12x+16-448=0
2x^2-12x-432=0
2(x^2-6x-216)=0
2(x-18)(x+12)=0
x-18=0
x=18 
18-4=14 one side after corner cuts.
2*18=36-4=32 the other side after corner cuts.
Proof:
14*32*2=896
896=896


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