Write the coefficient of $x^{2}$ in each of the following
(i) $15 - 3 x + 2 x^{2}$
(ii) $1 - x^{2}$
(iii) $π x^{2} - 3 x + 5$

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Solution

(i) $15 - 3 x + {2 x}^{2}$
Co=efficient of $x^{2} = 2$
(ii) $1 - x^{2}$
Co-efficient of $x^{2} = - 1$
(iii) $π x^{2} - 3 x + 5$
Co-efficient of $x^{2} = π$

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Question 54 (ii)

Write the coefficient of $x^{2}$ in the following:

$x^{3} - 2 x^{2} + 3 x + 1$

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