If x-y = 4 and xy = 21 then find the value of x 3 - y 3
Answers
Answered by
3
x-y=4 and xy= 21
x3-y3= (x-y)3+3xy(x-y)
=4^3+3×21×4
=64+262=322
x3-y3= (x-y)3+3xy(x-y)
=4^3+3×21×4
=64+262=322
Similar questions