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Alona [7]
1 year ago
8

Question 1 of 10

Mathematics
2 answers:
jok3333 [9.3K]1 year ago
7 0

Answer: \Large\boxed{-x^3-9x^2}

<em>Hi there! By my calculation, I got the answer above. However, it doesn't fit any one of the answer choices. I am not sure if I am totally correct, but I have been double-checking my answers. Please let me know whether it's the answer choices mistaken or I am wrong so that I could modify my answer if necessary.</em>

Step-by-step explanation:

<u>Given expression</u>

- (3x³ + x²) +2 (x³ - 4x²)

<u>Expand parenthesis by the distributive property</u>

= -3x³ - x² + 2x³ - 8x²

<u>Combine like terms</u>

= -3x³ + 2x³ - x² - 8x²

\Large\boxed{=-x^3-9x^2}

Hope this helps!! :)

Please let me know if you have any questions

Anna11 [10]1 year ago
6 0

Answer:

B.  -x³ - 9x².

Step-by-step explanation:

- (3x³ + x²) +2 (x³ - 4x²)

= -3x³  + 2x³  - x² - 8x²

= -x³ - 9x²

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150

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1. 4^3 = 4 x 4 x 4 = 16 x 4 = 64

2. 64 - 4 = 60

3. 60 ÷ 2 = 30

4. 30 ⋅ 5 = 150

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