Question

If x + y = 5 and xy = 7 then find the value of x^3+y^3​

Answer 1

Answer:

20

Step-by-step explanation:

Given,

x+y=5

xy=7

To find: x^3+y^3

Then,

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

= (5)^3-3×7×(5)

=125-21×5

=125-105

=20

therefore, x^3+y^3=20