Question

formula of a-b whole 7

Answer 1

FORMULA :
(a-b)^7=a^7 - 7a^6b + 21a^5b^2 - 35a^4b^3 + 35a^3b^4 - 21a^2b^5 + 7ab^6 - b^7.

Answer 2

$(a + b) {}^{7} \\ then \\ (a + b) {}^{2} \times (a + b) {}^{2} \times (a + b) {}^{3}$