Question

if (x+y)=10 and xy=2, then the value of the sum of cubes of x and y is ​

Answer 1

Answer:

Step-by-step explanation:

[x+y]^2 = x^2 + y^2 + 2xy

10^2 = x^2 + y ^2 + 2 *2

100 - 4 = x^2 + y^2

96 = x^2 = y^2

now

x^3 + y^3 = [x+y] [ x^2 + y^2 - xy ]

x^3 + y^3 = [ 10] [ 96 - 2 ]

x^3 + y^3 = 940

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Answer 2

Answer:

940

Step-by-step explanation:

x³+y³= (x+y)³-3xy(X+y)

= (10)³-3*2(10)

=1000-60

=940