Classify the following algebraic expressions as monomials, binomials, trinomials or polynomials.
(i) $7 x$ (ii) $5 y - z$ (iii) $3 x^{3} - 5 x^{2} - 11$ (iv) $1 - 8 a - 7 a^{2} - 7 a^{3}$ [4 Marks]

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Solution

(i) $7 x$
Monomial [1 Mark]

(ii) $5 y - z$
Binomial [1 Mark]

(iii) $3 x^{3} - 5 x^{2} - 11$
Trionomial [1 Mark]

(iv) $1 - 8 a - 7 a^{2} - 7 a^{3}$
Polynomial [1 Mark]

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