SOLUTION: the length of a rectangle is 3cm more than its width. the area is 471 cm what is the width?

Question 416924: the length of a rectangle is 3cm more than its width. the area is 471 cm what is the width?
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
L=W+3
A=LW
471=(W+3)W
471=W^2+3W
W^2+3W-471=0

w=(-3+-sqrt[3^2-4*1*-471])/2*1
w=(-3+-sqrt[9+1,884])/2
w=(-3+-sqrt1,893)/2
w=(-3+-43.509)/2
w=(-3+43.509)/2
w=40.509/2
w=20.253 ans.
w=(-3-43.509)/2
w=46.509/2
w=23.253 ans.
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