The second term of the expansion is  .
.
Solution:
Given expression:

To find the second term of the expansion.

Using Binomial theorem,
 
Here, a = a and b = –b

Substitute i = 0, we get

Substitute i = 1, we get

Substitute i = 2, we get

Substitute i = 3, we get

Substitute i = 4, we get

Therefore,



Hence the second term of the expansion is  .
.
 
        
             
        
        
        
Answer:
Step-by-step explanation:


 
        
             
        
        
        
Answer:
k = g + a
Step-by-step explanation:
g = k - a ( add a to both sides )
g + a = k , that is
k = g + a
 
        
             
        
        
        
Slope-intercept form:  y = mx + b
(m is the slope, b is the y-intercept or the y value when x = 0 --> (0, y) or the point where the line crosses through the y-axis)
For lines to be perpendicular, their slopes have to be the negative reciprocal of each other. (Basically flip the sign +/- and the fraction(switch the numerator and the denominator))
For example:
Slope = 2 or 
Perpendicular line's slope =  (flip the sign from + to -, and flip the fraction)
   (flip the sign from + to -, and flip the fraction)
Slope = 
Perpendicular line's slope =  (flip the sign from - to +, and flip the fraction)
  (flip the sign from - to +, and flip the fraction)
y = 1/3x + 4        The slope is 1/3, so the perpendicular line's slope is  or -3.
 or -3.
Now that you know the slope, substitute/plug it into the equation:
y = mx + b
y = -3x + b       To find b, plug in the point (1, 2) into the equation, then isolate/get the variable "b" by itself
2= -3(1) + b     Add 3 on both sides to get "b" by itself
2 + 3 = -3 + 3 + b
5 = b
y = -3x + 5