13. Find the value of
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Puneet179:
can you please mention the steps
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given X +Y = 3
cubing both sides
(X+Y)³ = 3³
X³+Y³+3XY(X+Y) = 27
X³+Y³+3XY*3 = 27
X³+Y³+9XY-27=0
cubing both sides
(X+Y)³ = 3³
X³+Y³+3XY(X+Y) = 27
X³+Y³+3XY*3 = 27
X³+Y³+9XY-27=0
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