Question

solve this plz fast.​

Answer 1

Answer:

this is a formula I think

Answer 2

Answer:

$(a + {b})^{3} = {a}^{3 } + 3 {a}^{2} b + 3a {b}^{2} + {b}^{3}$

$(a - {b})^{3} = {a }^{3} - 3 {a}^{2}b + 3a {b}^{2} - {b}^{3}$