Answers

2016-07-24T01:48:57+08:00
Let x be the width. Then, the length should be 2x - 1. And the area is 28 cm^2

LW = A
(2x-1)(x) = 28
2x^2 - x = 28
2x^2 - x - 28 = 0

Factor it out and you get:

x = -7/2   x = 4  Disregard -7/2 since a distance can't be negative

Substitute the value of x:

L = 2x - 1
L = 2(4) - 1
L = 7

W = 4

LW = A
7(4) = 28
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