What is the coefficient of x2 in the expansion of(x+2)3

First expand:







Now combine like terms:



A coefficient is a number that is in front of an x. The number in front of the  x squared term is 6.

So the answer is 6.

This polygon has 4 sides
180(4-2) = 180(2) = 360 degree
80+90+2x + 3x = 360
170+5x = 360
5x = 190
x= 38
measure of angle t is 2(38)= 76
the answer is c. trust me
hope this !