1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mestny [16]
3 years ago
9

Factor completely 3x ^2 -27

Mathematics
2 answers:
pentagon [3]3 years ago
6 0
Both terms are multiply of 3, so you can factor 3 out;

3(x² - 9)

Now, we can see that x² - 9 is difference of two perfect squares

Recall that a² - b² = (a+b)(a-b)

So we have x²-9 = (x+3)(x-3)

So we can factor more here; 3(x²-9) = 3(x+3)(x-3)

Final answer: 3(x+3)(x-3)
Tom [10]3 years ago
3 0
First, factor out a 3.
3(x² - 9)

In any quadratic ax² + bx + c, we can split the bx term up into two new terms which we want to equal the product of a and c.
In this case, we have x² + 0x - 9. (the 0x is a placeholder)
We want two numbers that add to 0 and multiply to get -9.
Obviously, these numbers are 3 and -3.

Now we have 3(x² + 3x - 3x - 9).
Let's factor.
3(x(x+3)-3(x+3))
<u>3(x-3)(x+3)</u>

There are multiple shortcuts which you could make here, FYI:
Instead of splitting the middle, if your a value is 1, you can go straight to that step (x+number)(x+other number).
Whenever you have a difference of squares, like a²-b², that factors to (a+b)(a-b).
You might be interested in
7. Mr. Garcia bought 27 large boxes of chlorine tablets and 33 small boxes of chlorine tablets. Each
AVprozaik [17]

Answer:

$2,487.00

Step-by-step explanation:

27x53= 1431

33x32= 1056

1056 + 1431= 2487

4 0
3 years ago
2) A fair coin was tossed 75 times. The coin landed on Heads 42 times and Tails 33 times. What is the experimental probability o
coldgirl [10]

Answer:

\frac{11}{25}

Step-by-step explanation:

In the experiment that was conducted the coin was tossed a total of 75 times and out of those times it only landed on tails 33 times. Therefore the experimental probability of the coin landing on tails can be calculated by the dividing the times it landed on tails by the total number of times it was tossed. Like so...

\frac{33}{75} or 0.44

This fraction can also be simplified to its simplest form of \frac{11}{25} which is obtained by dividing both the numerator and denominator by 3

5 0
3 years ago
What is the sum of 16x^3 – 5x– 2 and 6x^2 +3x+ 5?
Yuri [45]

Answer: 6x^2

Step-by-step explanation:

3 0
2 years ago
(5x+3)(5x+3)gghhhhhhhh
Stella [2.4K]

Answer:

25x^2 + 30x + 9

8 0
2 years ago
Solve the system of equations below.
trapecia [35]

Answer:

A) x + y = 8

B) 3x + 2y = 21

We multiply A) by -2

A) -2x -2y  = -16 Then we add this to

B) 3x + 2y = 21

x = 5

y = 3

Second answer is correct

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • skinny Malone has a lot of pets he has 4 more goldfish than Turtles and one less Canary than goldfish six of his pets are birds.
    5·1 answer
  • The pentagon PORSTis transformed into POR'ST using which two transformations?
    12·1 answer
  • choose an object that is the same length as a real baseball bat explain how to estimate its length in feet
    9·1 answer
  • The volume of a cone with a radius of 7 cm is 147x cubic centimeters. Which expression can be used to find h, the height of the
    6·1 answer
  • Evaluate the factorial expression. 9!/(9-2)!
    6·1 answer
  • 4(-x+4)=12 <br> With steps
    13·2 answers
  • (√2-3)(√2+3) what is this?
    11·2 answers
  • How do u find the domain to the first one
    5·1 answer
  • 1.) Find the slope of the line passing through (0, 1) and (2,5)
    8·1 answer
  • Work out the size of angle x<br> HELP???
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!