Question

(m-1)^3;(1+2n)^3;(5a+2n)^3;(y-2n)^3

Answer 1

(m2+n2)/(m3+n3)-1/2(m+n)=(2(m2+n2)-(m2+n2-mn))/2(m3+n3)=(m2+n2+nm)/2(m3+n3) но я не уверена

Answer 2

Expanding each expression using the cube of a binomial formula, we get:

1. (m-1)^3 = m^3 - 3m^2 + 3m - 1
2. (1+2n)^3 = 1 + 6n + 12n^2 + 8n^3
3. (5a+2n)^3 = 125a^3 + 150a^2n + 60an^2 + 8n^3
4. (y-2n)^3 = y^3 - 6yn^2 + 12n^2y - 8n^3

Note that each term in the expansion is a combination of powers of the two original terms, with coefficients determined by the binomial coefficients of the expansion.