Question

write a coefficient of x in the expansion of (2-x)^2​

Answer 1

Step-by-step explanation:

or (2+x)5=32+80x+80x2+40x3+10x4+x5 Therefore the coefficient of x2 in the expansion of (2+x)5 is 80.

Answer 2

Answer:

(2-x)²=4-4x+x²

Step-by-step explanation:

hence your answer is -4

Using identity(a-b)²=a²-2ab+b²