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daser333 [38]
3 years ago
6

Find the factors from the roots, then multiply the factors together. y=x3−3.5x2+3.5x−1

Mathematics
1 answer:
neonofarm [45]3 years ago
8 0

Answer:

hello :

y=x3−3.5x²+3.5x−1

y = (x3 - 1 ) - 3.5 ( x² - 1)

y= (x -1 ) ( x² + x + 1 ) + 3.5 ( x - 1 ) (x + 1)

y = ( x - 1 ) ( x² + x + 1 + 3.5x -3.5)

y = (x - 1 ) ( x² + 4.5x  - 2.5)

the dicriminent of  x² + 4.5x  - 2.5  is : Δ = (4.5)²- 4(1)(- 2.5) = 30.25 = (5.5)²

x1 = ( - 4.5  -  5.5)/2         x2 =  ( - 4.5  + 5.5)/2

x1 = - 5    x2 = 1/2 = 0.5

y = (x - 1 )( x +5) (x - 0.5)

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Step-by-step explanation:

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In the given problem it is given that side of square is 10 inches.

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The approximate area of the park on the grid is: E. about 40 km² to 50 km².

<h3>How to Find the Approximate Area on a Coordinate Grid?</h3>

The number of square on a coordinate grid that is covered determines the area covered. We can make an estimate by counting how many of this square on the coordinate grid that is covered, then find out the area depending on how much square area each grid represents.

In the coordinate plane given, which shows a park, we are told that each of the square on the grid equals 1 k = square kilometer.

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