SOLUTION: a rectangular bedroom is 7 ft longer than it is wide. its area is 228 ft. what is the width of the room

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Question 615681: a rectangular bedroom is 7 ft longer than it is wide. its area is 228 ft. what is the width of the room
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
w(w + 7) = 228 ___ w^2 + 7w - 228 = 0

factoring ___ (w + 19)(w - 12) = 0

w + 19 = 0 ___ w = -19 ___ negative value not realistic

w - 12 = 0 ___ w = 12