x³+y³ and xy if x+y=5 and x-y =3 ?
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x+y=5
x-y=3
on adding above 2 eqn we get
x=4 and y=1on putting in equation x+y=5
on putting the value of x in equation x-y=3 we get y=7
and on putting the value of y=7 we get x=2
so
x^3=64
y3=1
x^3+y^3=65
value of xy=4
on putting x=2 and y=7
x^3+y^3=351
value of
xy=14
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