Answer:
This deals with quadratics
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Let length be x.
Width is 4 less than length. Therefore, width:
(x - 4) units.
Now,
Area of rectangle = length × breadth
⇒ 45 = x(x - 4)
⇒ x² - 4x - 45 = 0
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Further, if you want to solve that equation, factoring and solving:
(x - 9)(x + 5) = 0
So, x = 9 or -5.
Ignore -5.
Therefore, length is 5 metres.
Breadth = 5 - 1 = 4 metres.
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