Quadratic Equations with complex solutions

Which of the following equations is the quadratic formula?

• 
  

  $b\pm\sqrt{b^2-4ac}$
  

• $\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

• $\frac{b\pm\sqrt{b^2-4ac}}{2a}$

• $\frac{-b\pm\sqrt{4ac-b^2}}{2a}$

Tags

CCSS.HSA-REI.B.4B

Solve the quadratic equation with the quadratic formula 
 $x^2-4x+5=0$  

•  $x=2\pm2i$  

•  $x=2\pm i$  

•  $x=-2\pm2i$  

•  $x=-2\pm i$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve the quadratic equation with the quadratic formula

 $x^2+6x+12=0$  

•  $x=3\pm i\sqrt{3}$  

•  $x=\pm i\sqrt{3}$  

•  $x=-3\pm i\sqrt{3}$  

•  $x=\pm\sqrt{3}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve the quadratic equation using the quadratic formula

 $x^2+6x=-13$  

•  $x=\pm2i$  

•  $x=3\pm2i$  

•  $x=\pm3i$  

•  $x=-3\pm2i$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

In the quadratic formula a, b, and c are?

• All complex numbers

• All real numbers

• All zeros

• All imaginary numbers

Tags

CCSS.HSA-REI.B.4B

Solve the quadratic equation using the quadratic formula

 $x^2+4x=-2$  

•  $x=1\pm\sqrt{3}$  

•  $x=-2\pm\sqrt{2}$  

•  $x=-1\pm\sqrt{3}$  

•  $x=2\pm\sqrt{2}$  

Tags

CCSS.HSA-REI.B.4B