Question

find by inspection the coefficient of x in the following expansion
(i) (x + 1) (3 - x) ​

Answer 1

Step-by-step explanation:

x(3-x) +1(3-x) 3x-x²+3-x=0

-x²-3x-x+3=0

x=1

Answer 2

Answer:

the coefficient of x²= -1

the coefficient of x= 2

Step-by-step explanation:

(x + 1) (3 - x)

x(3-x)+1(3-x)

3x-x²+3-x

-x²+2x+3

the coefficient of x²= -1

the coefficient of x= 2