If $x = - 2$ , then find the value of the following algebraic expression.
$3 x^{2} - 5 x + 1$

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Solution

The given expression is $3 x^{2} - 5 x + 1$
Now substitute the value of $x = - 2$
$3 {(- 2)}^{2} - 5 (- 2) + 1 \Rightarrow 3 (4) + 10 + 1 \Rightarrow 12 + 10 + 1 = 23$
Hence the value of the expression is $23$

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