the area of a rectangle is given by the expression x^2+5x+4. If the length of one side is given by x+2, what is the length of th e other side?
1 answer:
Answer:
Step-by-step explanation:
The area of a rectangle is given by the multiplication of its base by its height :
(1)
In addition we are told the length of one of the sides (let's choose ) is:
(2)
Substituting (2) in (1):
(3)
Isolating :
Factoring in the numerator:
This is the length of the other side of the rectangle
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