Question

Find the coefficient ofx in the expansion of the product
1 (1 + 2x)5(1 – x)”.
TO​

Answer 1

Step-by-step explanation:

(1+2x)(1-x)×5=(1-x+2x-2x^2)5

(2x^2+x+1)5=10x^2+5x+5

hence coefficient of x=5