MATHS!!!Please HELP..:'(
posted by HELP!!! .
What is the coefficient of x^4 in (x^2−x−2)^7?

expanded form is :::x^147 x^13+7 x^12+49 x^1191 x^10161 x^9+357 x^8+363 x^7714 x^6644 x^5+728 x^4+784 x^3224 x^2448 x128
posted by HELP!!! .
What is the coefficient of x^4 in (x^2−x−2)^7?
expanded form is :::x^147 x^13+7 x^12+49 x^1191 x^10161 x^9+357 x^8+363 x^7714 x^6644 x^5+728 x^4+784 x^3224 x^2448 x128