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Inessa [10]
3 years ago
14

Coefficient of x^2 in the expansion of (x-3)^3

Mathematics
2 answers:
Mila [183]3 years ago
7 0

Answer:

-9

Step-by-step explanation:

(x-3)(x-3)(x-3)

(x^2-6x+9)(x-3)

x^3-9x^2+27x-27

Therefore, the coefficient of x^2 is -9.

Romashka [77]3 years ago
7 0

Answer:

-9

Step-by-step explanation:

=> (x-3)³

=> (x-3)(x-3)(x-3)

=> (x²-6x+9)(x-3)

=> x³-3x²-6x²+18x+9x-27

=> x^3-9x^2+27x-27

<u><em>So, the coefficient of x² is -9</em></u>

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Elena-2011 [213]

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4 0
3 years ago
Ryan is trying a low-carbohydrate diet. He would like to keep the amount of carbs consumed in grams between the levels shown in
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<em />x > 50<em> and </em>x < 150<em>.  Ryan needs to consume more than 50 grams of carbohydrates, but less than 150 grams of carbohydrates.</em>

<em />

We have:

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