Question

Write the expansion formula (a+b)3​

Answer 1

Answer:

a^3+3a^2b+3ab^2+b^3

Answer 2

Step-by-step explanation:

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

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

=. a( a²+b²+2ab) + b(a²+b²+2ab)

=. a³+ab²+2a²b+a²b + b³+2ab²

=. a³+3ab²+3a²b+ b³