The correct option is C x^2 + y^2 + z^2 + 2(xy yz zx)Use identity (a + b c)^2 = a^2 + b^2 + c^2 + 2(ab bc ca) ...

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Algebraic Identity 3

Expansion of ...

Question

Expansion of $(x + y - z)^{2}$ :

x^{2} + y^{2} + z^{2} + 2 (x y - y z - z x)

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x^{2} + y^{2} + z^{2} - 2 (x y + y z + z x)

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x^{2} + y^{2} + z^{2} - 2 (x y - y z + z x)

No worries! We‘ve got your back. Try BYJU‘S free classes today!

x^{2} + y^{2} + z^{2} + 2 (x y + y z + z x)

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Solution

The correct option is A $x^{2} + y^{2} + z^{2} + 2 (x y - y z - z x)$
Use identity
$(a + b - c)^{2} = a^{2} + b^{2} + c^{2} + 2 (a b - b c - c a)$

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