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Furkat [3]
3 years ago
9

The area of a rectangular garden is given by the trinomial x2 + x – 42. What are the possible dimensions of the rectangle? Use f

actoring.
Mathematics
2 answers:
gizmo_the_mogwai [7]3 years ago
8 0

Answer:

<h3>\boxed{ \boxed{ \bold{ \sf{(x + 7) \: and \: (x - 6)}}}}</h3>

Step-by-step explanation:

\sf{ {x}^{2}  + x - 42}

Here, we have to find two numbers which subtracts to 1 and multiplies to 42

⇒\sf{ {x}^{2}  + (7 - 6)x - 42}

⇒\sf{ {x}^{2}  + 7x - 6x - 42}

Factor out x from the expression

⇒\sf{x(x + 7) - 6x - 42}

Factor out 6 from the expression

⇒\sf{x(x + 7) - 6(x + 7)}

Factor out x + 7 from the expression

⇒\sf{(x + 7)(x - 6)}

So, the possible dimensions of the rectangle are x + 7 and x - 6 .

Hope I helped!

Best regards!

Murrr4er [49]3 years ago
3 0

Answer:

Step-by-step explanation:

Hello, please consider the following.

x^2+x-42\\\\\text{The sum of the zeroes is -1=-7+6 and the product is -42=-7*6.}\\\\\text{So, we can factorise.}\\\\x^2+x-42\\\\=x^2+7x-6x-42\\\\=x(x+7)-6(x+7)\\\\=(x+7)(x-6)

So, the possible dimensions of the rectangle are (x+7) and (x-6).

Thank you.

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