Question

factorise x cube + 8 y cube + 6 x y

Answer 1

we can factorise the given problem by formula
x^3+8y^3+6xy(x+2y)
=(x)^3 + (2y)^3 + 6xy(x+2y)
it is in the form of x^3 +y^3 +3xy(x+y)
so.by the formula
x^3 +y^3 +3xy(x+y) =(x+y)^3
substitute the given values in the formula
(x)^3 + (2y)^3 + 3*x*2y(x+2y)
so by formula
(x+2y)^3
the final answer is (x+2y)^3......