Question

15 Find the coefficient of x2 in the expansion of
(x2 + x + 1)2 + (x2 - x + 1)2.​

Answer 1

Answer:

0

Step-by-step explanation:

hopw it helps follow me and mark me brainliest

Answer 2

Step-by-step explanation:

(x2 + x + 1)2 + (x2 - x + 1)2.

firstly expand it

= (x2 + x + 1)(x2 + x + 1) + (x2 - x + 1) (x2 - x + 1)

= x2(x2 + x + 1)+x(x2 + x + 1)+1(x2 + x + 1)+x^2(x2 - x + 1)-x(x2 - x + 1)+1(x2 - x + 1)

= x^4+x^3+x^2+x^3+x^2+x+x2 + x +1+x^4-x^3+x^2-

-x^3+x^2-x+x2 - x +1

= 2x^4+6x^2+x+2

coefficient of x2 is 6