Find the value of the expression for $x = - 1$ :
$x^{2} + 2 x + 4$ .

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Solution

Given the expression is $x^{2} + 2 x + 4 = (x + 1)^{2} + 3.$

For $x = - 1$ we've,

$(- 1 + 1)^{2} + 3$

$= 0 + 3$

$= 3$ .

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