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Karolina [17]
3 years ago
14

The area of a rectangle is 99 in². The length of the rectangle is 2 in. longer than the width.

Mathematics
1 answer:
tangare [24]3 years ago
6 0
A = L * W
A = 99
L = W + 2

99 = W(W + 2)
99 = W^2 + 2W
W^2 + 2W - 99 = 0
(W - 9)(W + 11) = 0

W - 9 = 0
W = 9

W + 11 = 0
W = -11 (extraneous solution....this one does not work)

L = W + 2
L = 9 + 2
L = 11

check..
A = L * W
99 = 11 * 9
99 = 99 (correct)

so the length (L) = 11 and the width (W) = 9
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