Question

${x}^{2} + 4x + 4 = {?}{}$
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Answer 1

Answer:

$x^{2} + 4x + 4 \\ {x}^{2} + 2x + 2x + 4 \\ x(x + 2) + 2(x + 2) \\ x = - 2 \\ x = - 2$