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Addition and Subtraction of Algebraic Expression

Simplify :- ...

Question

Simplify :-
$x^{2} + z^{2} - 2 x z$

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Solution

Now,
$x^{2} + z^{2} - 2 x z$
$= x^{2} - 2 x z + z^{2}$
$= (x - z)^{2}$ .

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