solving quadratics review

Solve by factoring:

 $n^2+3n=0$  

•  $\left\{-3,0\right\}$  

•  $\left\{3,0\right\}$  

• No Real Solution

•  $\left\{-3,-1\right\}$  

 $Solve\ by\ factoring:\ x^2-x\ -\ 49\ =\ 7$  

• {4, 3}

• {-7, 8}

• {-7, 7}

• {4, -8}

 $Solve\ by\ factoring:$   $3x^2+20x-7=0$  

•  $\left\{-\frac{20}{3},\ 7\right\}$  

•  $\left\{\frac{5}{2},\ -\frac{1}{2}\right\}$  

•  $\left\{\frac{1}{3},\ -7\right\}$  

•  $\left\{-21,\ 1\right\}$  

 $Solve\ with\ the\ Quadratic\ Formula:$   $2r^2+r-2=0$  

•  $\left\{\frac{\sqrt{5}}{5},\ -\frac{\sqrt{5}}{5}\right\}$  

•  $\left\{\frac{2i\sqrt{5}}{5},\ -\frac{2i\sqrt{5}}{5}\right\}$  

•  $\left\{\frac{-1+\sqrt{5}}{4},\ \frac{-1-\sqrt{5}}{4}\right\}$  

•  $\left\{\frac{-1+\sqrt{17}}{4},\ \frac{-1-\sqrt{17}}{4}\right\}$  

Solve using the quadratic formula:

 $x^2+5x+7=0$  

•  $\frac{-5\pm\sqrt{3}}{2}$  

•  $\frac{-5\pm i\sqrt{3}}{2}$  

•  $\frac{-5\pm\sqrt{53}}{2}$  

•  $\frac{-5\pm i\sqrt{53}}{2}$  

Solve using the quadratic formula:

 $x^2+10x+35=0$  

•  $-5\pm2i\sqrt{5}$  

•  $-5\pm i\sqrt{5}$  

•  $-5\pm2i\sqrt{10}$  

•  $-5\pm i\sqrt{10}$