Respuesta :

lets assume the length=y and the width=x
y=x+3

A=xy
A=x(x+3)
A=x^2+3x
154=x^2+3x
0=
x^2+3x-154

use the quadratic formula

x=11
x=-14 DNE

therefore the width is 11

The width would be 51m
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