Expand the given polynomial — task. Mathematics CBSE, Class 9.

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

\(=\)

i x^{i} + i^{i} + z^{i} - i x i - i y z + i i z

[Note: Insert answer as per the order of the identity and enter coefficient followed by the variable with its power.]

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9. Expand the given polynomial