Factorizations of 4 :

Jordan takes a 400 -mile round-trip flight to visit his parents. To qualify for Gold status at Awesome Airlines, one must fly at least 8800 and less than 20000 miles each year. How many times would Jordan need to visit his parents each year to attain Gold status? Express your answer in interval notation.

\[ x^{2}-2 x+\Delta=21+\boldsymbol{L} \] Qual valor de \( \Delta \) faria com que o lado esquerdo da equação foss quadrado de um polinômio de primeiro grau? ?

\begin{tabular}{|l|l|}\hline\( \quad \frac{\square}{9}=1 \) & (b) \( \quad \frac{3}{\square}=3 \) \\ \hline\end{tabular}

Na equação: \( 3 x^{2}+2 x+c^{2}=0 \), sendo o coeficiente \( c \) um número negativo, o valor de \( \underline{c} \) para que o produto entre as raízes dessa equação seja 48 é: \( \begin{array}{lllll}\text { a) }-11 & \text { b) }-8 & \text { c) }-9 & \text { d) }-14 & \text { e) }-12\end{array} \)

Factor the expression \( x^{2}-8 x+16 \)