Question

if x-y=4 and xy=1,find the value of x3-y3​

Answer 1

Step-by-step explanation:

( x - y)^3 = x^3 - y^3 - 3xy (x - y)

Putting the value,

(4)^3 = x^3 - y^3 - 3(1) (4)

64 = x^3 -y^3 - 12

x^3 - y^3 = 64+ 12= 76

Answer. x^3 - y^3 = 76