Ashliegonzalvoidn
Answered

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what is the mathematical sentence of area of rectangle whoise width is four less than its length is forty five​

Sagot :

Suprathiksirimilla20idn

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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