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Classify the following polynomials as polynomials in one-variable, two variables etc.: `t^3-3t^2+4t-5` (ii) `x y+z y+z x`

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(i)`t^3-3t^2+4t-5` It is a polynomial in one variable in t.
Given , (ii) `x y+z y+z x` It is a polynomial in 3 variable in x, y and z.
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