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
Novosadov [1.4K]
3 years ago
12

Find the 5th term in the expansion of (a + b)º in simplest form.

Mathematics
1 answer:
Tamiku [17]3 years ago
7 0

Answer:

5^{th} term  = 126a^5b^4

Step-by-step explanation:

\left(a+b\right)^n=\sum _{i=0}^n\binom{n}{i}a^{\left(n-i\right)}b^i\\\\(a + b)^9 =\sum _{i=0}^9\binom{9}{i}a^{\left(9-i\right)}b^i\\\\

       =a^9 + 9a^8b + 36a^7b^2 + 84a^6 b^3 + 126a^5b^4+ 126a^4b^5+84a^3b^6+ 36a^2b^7+ 9ab^8+b^9

5^{th} term  = 126a^5b^4

You might be interested in
Solve for the roots in simplest form by completing the square <br><br> x^2-12x+20=0
Alex17521 [72]

Answer:

x = 10 or x = 2

Step-by-step explanation:

Solve for x:

x^2 - 12 x + 20 = 0

Hint: | Solve the quadratic equation by completing the square.

Subtract 20 from both sides:

x^2 - 12 x = -20

Hint: | Take one half of the coefficient of x and square it, then add it to both sides.

Add 36 to both sides:

x^2 - 12 x + 36 = 16

Hint: | Factor the left hand side.

Write the left hand side as a square:

(x - 6)^2 = 16

Hint: | Eliminate the exponent on the left hand side.

Take the square root of both sides:

x - 6 = 4 or x - 6 = -4

Hint: | Look at the first equation: Solve for x.

Add 6 to both sides:

x = 10 or x - 6 = -4

Hint: | Look at the second equation: Solve for x.

Add 6 to both sides:

Answer: x = 10 or x = 2

5 0
3 years ago
If f(x) = 3x2 - x, find f(-2).<br><br> 10<br> 14<br> 38
mojhsa [17]

f(x) = 3x^2-x

F(-2)

 replace x with -2

3(-2)^2 - -2 =

3*4 +2 = 14

 Answer is 14


6 0
3 years ago
Read 2 more answers
Solve for x. 3^x−1=9^x+2 <br> Enter your answer in the box.
slava [35]

Answer:

-5 =x

Step-by-step explanation:

3^(x-1) = 9^(x+2)

Replace 9 with 3^2

3^(x-1) = 3^2^(x+2)

We know that a power to a power means the powers are multiplied

a^b^c = a^(b*c)

3^(x-1) = 3^(2x+2)

When the bases are the same, the powers have to be the same

x-1 = 2x+4

Subtract x from each side

x-x-1 =2x-x+4

-1 =x+4

Subtract 4 from each side

-1-4 =x+4-4

-1-4 = x

-5 =x

4 0
3 years ago
Translate the given phrase into an algebraic expression and simplify if possible: the sum of -4 and the difference of 3 and 1
Maru [420]
The answer is -12 have a great rest of your day
7 0
3 years ago
How many 100 are in 200,000
romanna [79]
Well to find this its quite simple.
Just divide 200,000 by 100 to get the answer of:
2,000
<em>~Hope this helped :)</em>
8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the value of y?
    9·1 answer
  • Which plot is located at (-3, -2)<br><br> Please help!!!
    7·2 answers
  • How can you used the distributive property to help find a product
    5·1 answer
  • Bruce bought two books one book cost $4.00 more than three times the other . Together, the two books cost him $72
    9·1 answer
  • SIZE A ranch in Wyoming is
    10·1 answer
  • Subtract. Write fraction in simplest form.<br> -2 3/7-1 2/3
    14·1 answer
  • Determine the slope of the line that has the following coordinates: (-3,6) (4,-2)
    14·1 answer
  • Is a ratio always a rate?
    14·2 answers
  • Show work <br> Need fast!!! <br><br> 4(1/3+ 1/3+ 1/3)
    11·1 answer
  • A shipping box has the dimensions shown. what is the volume of the cubic yards
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!