The width of a rectangular poster is half its length. The area of the poster is 128 square feet. What is the length of the poster?

1 Answer
Noah G
Jun 15, 2016

Let the length be #x# and the width be #x/2#.

Explanation:

#x(x/2) = 128#

#x^2/2 = 128#

#x^2 = 256#

#x = +-16#

A negative length is not possible; therefore the poster has a length of #"16 feet"#.

Hopefully this helps!

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