Question

If x+2y=10 and xy=2, then find the value of x×x×x+8y×y×y

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

880

Step-by-step explanation:

x+2y=10

cubing on both the sides

(a+b)^3=a^3+b^3+3ab(a+b)

x^3+8y^3+3(x)(2y)(x+2y)=1000

x^3+8y^3+6xy(10)=1000

substitute xy=2 here

x^3+8y^3=1000-60(2)

=880