Answers

2016-02-09T17:47:29+05:30
2016-02-10T13:26:57+05:30
X+y=5
[x+y]^2=5^2
x^2+y^2+2xy=25
111+2xy=25            {x^2+y^2=111}
xy=-43
[x+y]^3=5^3
x^3+y^3+3xy(x+y)=125
x^3+y^3=125+645=770
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