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Mathematics
Mathematics
Problem
If
x
+
y
=
a
x + y = a
x
+
y
=
a
and
x
2
+
y
2
=
b
x^2 + y^2 = b
x
2
+
y
2
=
b
, then the value of
(
x
3
+
y
3
)
(x^3 + y^3)
(
x
3
+
y
3
)
, is : (a)
a
b
ab
ab
(b)
a
2
+
b
a^2 + b
a
2
+
b
(c)
a
+
b
2
a + b^2
a
+
b
2
(d)
3
a
b
−
a
3
2
\frac{3ab - a^3}{2}
2
3
ab
−
a
3
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