What is the coefficient of

To expand any binomial of this kind, first write a^5, the first term.  

The coefficient of this term is 1 and it is the first term. The

coefficient of the second term (which has a^4 and (2b)^1 in it) is the

exponent of a in the first term times the existing coefficient (1),

divided by the number of the term. So, the coefficient of the second

term is 5*1/1 = 5.

Okay, so now we have:

  a^5 + 5*a^4*(2b)^1

To get the coefficient of the third term, apply the same rule. Take

the exponent of a in the second term, multiply by the coeffcient of

the second term and divide by the number of the term. So, 4*5/2 = 10.  

Now we have:

  a^5 + 5*a^4*(2b)^1 + 10*a^3*(2b)^2

Next, 3*10/3 = 10:

  a^5 + 5*a^4*(2b)^1 + 10*a^3*(2b)^2 + 10*a^2*(2b)^3

Next, 2*10/4 = 5, and so on.

equal to

step-by-step explanation:

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x