Answers

2014-07-23T16:15:23+08:00

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let x=width
     x+3=length

x(x+3) = 40
x² +3x = 40
x² +3x -40 = 0
(x+8)(x-5) = 0
x+8=0   ;   x-5=0
  x=-8   ;     x=5

Dimensions are width = 5m and length = 8m .
0
The other value for x is -8, but you can't use that because negative dimensions don't exist. Length=8m came from x+3
exactly. so, what is the dimension?
5x8 meters
what i mean is where at the two value of x can be the dimension of a rectangle, the 5 right?
Yup :)