If the square of (a + b) is m, and the square of (a-b) is n, we use the formula containing m to express the power of (AB) 3

If the square of (a + b) is m, and the square of (a-b) is n, we use the formula containing m to express the power of (AB) 3

(a+b)^2-(a-b)^2=4ab=m-n (ab)^3=[(m-n)/4]^3