Can someone help me with exercise 121?

Mathematics

1 answer:

yanalaym [24]3 years ago

8 0

It would be
(X^4+2X^2) -119(X^2-2X) then you would simplify
X^4+2X^2-119X^2-2X
So it would be
X^4+117X^2-2X=0
So basically X is undefined

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Among all the rectangles whose perimeters are 100 feet, find the dimensions of the one with the maximum area. explain step by st

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We let x be the length and y be the width of the rectangle. Then,

Perimeter = 2x + 2y
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50 = x + y
y = 50 - x

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A = 50x - x^2

We then take the derivative; set it equal to zero:

A ' = 50 - 2x
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Therefore, the dimensions are 25 and 25.

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Step-by-step explanation:

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