what is the exact formula???!?

Question

sorryy!!!
i forgot the formula of (a+b)^3
and the formula of (a-b)^3
kindlyy helpp meeeeeeeeeeeee

Answer 1

(a+b)^3=a^3+3a^2b+3ab^2+b^3
=a^3+b^3+3ab(a+b)
(a-b)^3=a^3-3a^2b+3ab^2-b^3
=a^-b^3-3ab(a-b)

Answer 2

(a+b)^3 =a^3+3*a^2*b+ 3*a*b^2+b^3

if you change the sign of b you change the sign of the odd powers of b so

(a-b)^3 =a^3-3*a^2*b+ 3*a*b^2-b^3

Answer 3

(a+b)^3=[(a+b)^2](a+b)
=[a^2+b^2+2ab](a+b)
=a^3+ab^2+2(a^2b)+a^2b+b^3+2(ab^2)
=a^3+b^3+3(ab^2)+3(a^2b)


(a-b)^3=[(a-b)^2](a-b)
=[a^2+b^2-2ab](a-b)
=a^3+ab^2-2(a^2b)-a^2b-b^3+2(ab^2)
=a^3-b^3-3(a^2b)+3(ab^2)

The final result can be memorised these steps will help you to memorise the result easily.

Answer 4

(a+b)^3=(a^3)+3(a^2)(b)+3(a)(b^2)+(b^3)

(a-b)^3=(a^3)-3(a^2)(b)-3(a)(b^2)-(b^3)