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

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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) About Me  (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+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
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.