Question 1 of 10

Mathematics

2 answers:

jok3333 [9.3K]2 years ago

7 0

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

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.

Step-by-step explanation:

Given expression

- (3x³ + x²) +2 (x³ - 4x²)

Expand parenthesis by the distributive property

= -3x³ - x² + 2x³ - 8x²

Combine like terms

= -3x³ + 2x³ - x² - 8x²

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

Hope this helps!! :)

Please let me know if you have any questions

Anna11 [10]2 years 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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katrin2010 [14]

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7 0

3 years ago

Roopa and Noor try to simplify the expression 18 x 4 the power of 2 + (9-3) the power of 2. Roopa simplifies the expression and

pentagon [3]

Answer:

Noor was right because the answer is 324

Step-by-step explanation:

the BODMA rule of solving the expression the bracket first before applying the index or before multiplying.

The correct way of solving the expression is

18 x 4x 4 + (9-3)(9-3)

= 18×16 + 6×6

= 288 + 36