4.
18. Length of a rectangle is 8 cm longer than its width. A square of side x centimeters is cut out of it)
centimeters is half the width of the rectangle, then the remaining area is square centimeters is
a) 3x2 + 16x
b) 2x2 + 8x
c) 3x2 + 8x
d) 2x + 16x
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Answer :-
= If width=W,length=8+W
= Total area of rectangle=W(8+W)
= 2x(8+2x)
= 16x+4x^2-x^2
= 3x^2+16x Answer
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