Question

the coefficient of x in the expansion of (x+3)² is​

Answer 1

Answer: 27

Step-by-step explanation:(a+b)  

3

=a  

3

+b  

3

+3a  

2

b+3ab  

2

 

(x+3)  

3

=x  

3

+27+9x  

2

+27x

Answer 2

Answer:

6

Step-by-step explanation:

expansion will become x^2+6x+9

by applying (a+b)^2=a^2+2ab+b^2