The expression
is equal to
(a) – –
(b) – +
(c) – –
(d) ( + – )
Sol:
As we know
(a + b + c)² = a² + b² + c² + 2(ab + bc + ca)
The expression
is equal to
(a) – –
(b) – +
(c) – –
(d) ( + – )
Sol:
As we know
(a + b + c)² = a² + b² + c² + 2(ab + bc + ca)
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