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3 years ago

What is the product of (3x + 1)(3x – 4)? Step by step.

Mathematics

2 answers:

gtnhenbr [62]3 years ago

8 0

Answer:

9x^2 - 9x - 4

Step-by-step explanation:

(3x + 1)(3x – 4)

Here you can use the FOIL method (FOIL stands for: First, Outer, Inner and Last)

First you multiply 3x by 3x since these are the First inside both binomials.

3x * 3x = 9x^2

Then you multiply 3x by -4 since these are the Outer inside both binomials.

3x * -4 = -12x

Then you multiply 1 by 3x since these are the Inner inside both binomials.

1 * 3x = 3x

Then you multiply 1 by -4 since these are the Outer inside both binomials.

1 * -4 = -4

And finally add everything together:

9x^2 + (-12x) + 3x + (-4)

Since adding a negative number is the same as subtracting it:

9x^2 - 12x + 3x - 4

We can now simplify this a little by adding all the x's together:

9x^2 - (12x + 3x) - 4 =

9x^2 - 9x - 4

Hope I could help you understand!

If you still wonder anything, don't hesitate to ask in the comments below!

Have a wonderful day! (●'◡'●)

kvasek [131]3 years ago

7 0

Answer:

9x^2-9x-3

Step-by-step explanation:

3x*3x=9x^2

3x*-4=-12x

1*3x=3x

1*-4=-3

9x^2-12x+3x-3

9x^2-9x-3

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bixtya [17]

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Step-by-step explanation:

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3 years ago

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madam [21]

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2. The question about the height of Ben's mother is non-statistical because it does not require data collection to answer and the data is not variable, since it is one data point.

<h3>What is a statistical question?</h3>

A statistical question can be answered by collecting data and for which data will vary.

Questions answered with a single data point are not statistical because there is no data variability to answer them.

A statistical question can be determined by the following criteria:

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Thus, the question about the weight of the players asks a statistical question, unlike the height of Ben's mother.

Learn more about statistical questions at brainly.com/question/12150562

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2 years ago

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kvv77 [185]

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3 years ago

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pshichka [43]

$\bold{2x - 15 = 5 - 3x} \\ \bold{2x + 3x = 15 + 5} \\ \bold{5x =20 } \\ \bold{x = \cancel{ \frac {20}{5} }} \\ \bold{x = 4}$