Step-by-step explanation:
The area of the floor of a rectangular room is 84 square feet. The length of the room is 5 feet more than its width. What is the width and length of a room?
A = L x W
84 = (W + 5) x W
84 = W² + 5W
W² + 5W - 84 = 0
factorise
(W - 7)(W + 12) = 0
W = 7
L = 7 + 5 = 12
Hope it Help.
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