Question

(x-y) ^3=x^3-y^3-3xy(x-y) proof this formula ​

Answer 1

Step-by-step explanation:

(x-y)^2(x-y)

(x^2+y^2-2xy)(x-y)____(:(a-b)^2)

mutipliction

x^2(x-y)+y^2(x-y)-2xy(x-y)

x^3-x^2y+y^2x-y^3-2x^2y+2xy^2

addition and subtraction

x^3-y^3-3x^2y+3xy^2

x^3-y^3-3xy(x-y)___(hear 3xy as taken commonly)

therfr it's proved