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
sdas [7]
4 years ago
9

Can someone please help me Factor 4x^2 - 81

Mathematics
2 answers:
Oduvanchick [21]4 years ago
6 0
The answer is (2x-9)(2x+9)

4x^2-81
2^2 x^2-9^2
(2x)^2-9^2
(2x-9)(2x+9)
Vsevolod [243]4 years ago
3 0

Answer:

(2x-9)(2x+9)

Step-by-step explanation:

This is a difference of squares because it can be written as (2x)^2-9^2

The formula for factoring a difference of squares is a^2-b^2=(a-b)(a+b)

So replace a with 2x and b with 9 giving us

4x^2-81=(2x-9)(2x+9)

You might be interested in
Squares square roots, perfect square
melamori03 [73]
The perfect squares are 25, 36, 49, 64, 81, 100, 121, 144, 169. You know a number is a perfect square when there is a whole number that can be multiplied by itself to get the number. Example: 25= 5x5
Hope that helps if you need a better explanation let me know.
7 0
3 years ago
PLEASE HELP ASAP!!! What is the standard form for the quadratic function? g(x) = (x + 5)^2 −1
dedylja [7]

Answer:

g(x)= x^2+10x + 24.

Step-by-step explanation:

g(x) = (x + 5)^2 −1

= x^2 + 5x + 5x + 25 - 1

= x^2 + 10x + 24

g(x)= x^2+10x + 24 is your answer.

Hope this helps!

4 0
3 years ago
Read 2 more answers
I need major help.......................
irakobra [83]

Answer:

0.108

Step-by-step explanation:

0.66 × 0.33 × 0.5 = 0.108.

Formula: L × W × H × 1/6.

L = 4

W = 2

H = 3

4×2×3.

We then have you multiply that by 1/6.

4×1/6 = 0.66.

2×1/6 = 0.33

3×1/6 = 0.5

0.66 × 0.33 × 0.5 = 0.108.

Now, onto the correct answers.

7) (4×1/6cm) × (2×1/6cm) × (3×1/6cm)

7 is correct, because the answer is diving each number by 1/6, and multiplying them with each other.

1) 1/216 × 24

1 is correct, because the answer when the question is evaluated is around 0.108. 1/216 × 24 = 0.11111111111. It is very close to the answer. This, indeed is correct.

7 0
3 years ago
Adam had silly putty 4 5/6 inches long. If he stretched it 2 2/3 times it's current length how long would it be?
Nikitich [7]
You multiply the 2 together 4 5/6 and 2 2/3. 
4 5/6=29/6
2 2/3=8/3 
you multiply the tops together then the bottoms together
29*8=232
3*6=18
232/18=116/9
8 0
3 years ago
Read 2 more answers
What is the length of the hypotenuse
tankabanditka [31]

Answer:

10

Step-by-step explanation:

8 to the second power is 64

6 to the second power is 36

36+64=100

the square root of 100 is 10

so 10 is the length of the hypotenuse

Hope this helps!

5 0
3 years ago
Other questions:
  • Write 2.96 as a mixed number or fraction in simplest form show your work
    8·1 answer
  • Please help! And if u do label the answers so Ik which is which if u answer n say idk I’ll report u
    10·1 answer
  • A plane flies over city A and reaches city B 115 miles away in 15 minutes.find the speed of the plane in the miles per hour assu
    5·2 answers
  • A student found the slope of a line that passes through the points (3, 15) and (5, 9) to be . What mistake did he make?
    13·2 answers
  • Frans paid R9600 as interest on a loan he took 5 years ago at 16% rate. What's was the amount he took as loan? Yeah
    10·1 answer
  • Trisha took 3.25 minutes to complete the race an Rachel took 3.207 minutes to complete the race who won the race ​
    8·2 answers
  • What is the inverse of the function f(x) = one-quarterx – 12?
    13·2 answers
  • Help me with these questions (picture) Plsss I will reward brainliest and points
    14·2 answers
  • Helpppppppppppppppppppppppppp
    8·1 answer
  • A circle had a radius 20 cm. What is the area?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!