Write the value of the expressions when $a = 1, b = 3$ and $c = 3 .$
$a^{3} - 3 b$

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Solution

The given expression can be written as :
$a^{3} - 3 b = a \times a \times a - 3 \times b$
Substituting the value of $a$ and $b$ , we get :
$a^{3} - 3 b = 1 \times 1 \times 1 - 3 \times 3 (a = 1, b = 3) = 1 - 9 = - 8$
So, the value of given algebraic expression is $- 8$ .

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