Simplify ( x + y + z )( x - y - z )
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Step-by-step explanation:
=X(x-y-z)+y(x-y-z)+z(x-y-z)
=x^2-xy-xz+xy-y^2-xz+xz-yz-z^2
=x^2-y^2-z^2
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Answered by
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Step-by-step explanation:
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