Posted by cris on Sunday, February 26, 2012 at 7:44pm.
A homeowner wants to plant a garden in his backyard. He decides to have 375 square feet garden and wants the garden to be 10 feet longer than it is wide. Find the dimensions of the garden.

math  bobpursley, Sunday, February 26, 2012 at 7:58pm
L=W+10
area= LW=375
375=W(W+10)
w^2+10W375=0
completing the square
W^2+10w+25=400
(w+5)=20
w=15,L=25

math  Reiny, Sunday, February 26, 2012 at 8:01pm
width  x ft
length  x+10 ft
solve
x(x+10) = 375
x^2 + 10x  375 = 0
(x+25)(x15) = 0
x = 15 or x = a negative
width: 15 ft
length : 25 ft
check: 15x25 = 375
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