if x^2+y^2=29 and xy =10 then find the value of x^3-y^3
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Step-by-step explanation:
x²+y²=29
xy=10
we know that ,
(x-y)²=x²+y²-2xy
=29-2*10
=29-20
=9
x-y=√9
=3
now,
(x-y)³=x³-y³-3xy(x-y)
(3)³=x³-y³-3*10*3
27=x³-y³-90
x³-y³=27+90
=117
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