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Ivahew [28]
4 years ago
7

(3n-1)(3n+2)...anyone know this?...

Mathematics
2 answers:
Alona [7]4 years ago
3 0
The answer to this question is 9n^2+3n-2. We expand this polynomial factored with the distributive property
(3n-1)(3n+2) = 3n(3n-1)+2(3n-1) = 9n^2 - 3n + 6n - 2 = 9n^2 + 3n - 2
4vir4ik [10]4 years ago
3 0
The first step for solving this expression is to multiply each term in the first parenthesis by each term in the second parenthesis (FOIL method)
3n × 3n + 3n × 2 - 3n - 2
Calculate the product of the first two numbers.
9n² + 3n × 2 - 3n - 2
Calculate the product of the next set of multiplication.
9n² + 6n - 3n - 2
Collect the like terms that have a variable of n to get your final answer.
9n² + 3n - 2
This means that the correct answer to your question is going to be 9n² + 3n - 2.
Let me know if you have any further questions.
:)
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A speed walker covered 4 1/2 mi in 3/4 hour. How far will he walk in 3/4 hour if he walks?
Nezavi [6.7K]

Given:

Consider the complete question is "A speed walker covered 4\dfrac{1}{4} mi in \dfrac{3}{4} hour. How far will he walk in 3/4 hours if he walks twice as fast?"

A speed walker covered 4\dfrac{1}{4} mi in \dfrac{3}{4} hour.

To find:

Distance covered by him if in 3/4 hour if he walks twice as fast.

Solution:

We have,

Distance=4\dfrac{1}{2}=\dfrac{9}{2}

It means a speed walker covered \dfrac{9}{2} mi in \dfrac{3}{4} hour.

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alexandr402 [8]

Answer:

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