Sum of products of a monomial and a trinomial — task. Mathematics CBSE, Class 7.

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Find the value of the trinomial algebraic expression

3 x - ay + bz

where

a = 3 c, b = 12 c^{3},

\begin{array}{l} x = 5 c^{3} + 2, \\ y = 5 c^{2} - c + 11, \\ z = 5 c - 1 \end{array}

Answer:

i c^{4} + i c^{3} + i c^{2} + i c + i

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14. Sum of products of a monomial and a trinomial