Question

if x-y = 5 and xy = 84 , find the value of x^3 - y^3​

Answer 1

Answer:

x-y=5

cubing on both sides

x^3-y^3-3xy(x-y)=125

x^3-y^3-3(5)(84)=125

x^3-y^3=125+1260

x^3-y^3=1385

Step-by-step explanation:

Answer 2

Step-by-step explanation:

check this image.

here is your answer.