Unit 5-Solve Quadratics w/ Imaginary Solutions Quiz

What is the  $\sqrt{-1}$  ?

•  $i$  

•  $-i$  

• 1

• -1

Tags

CCSS.HSN.CN.A.1

What is a complex number?

• A real number.

• A combination of a real and imaginary numbers.

• An imaginary number.

• A combination of a positive and a negative number.

Tags

CCSS.HSN.CN.A.1

This parabola shows no real solutions. Why does this parabola have no real solutions, but 2 imaginary solutions?

• because the parabola crosses the y-axis. 

• because the parabola goes down then up. 

• because the parabola is pointing upward. 

• because parabola does not cross the x-axis and crosses the axis on an imaginary plane. 

What are the a,b, and c values for the function:  $y=x^2-4x+5$  

•  $a=1,\ b=4,\ c=-5$  

•  $a=1,\ b=-4,\ c=5$  

•  $a=1,\ b=-4,\ c=-5$  

What the correct set up of the quadratic formula for the quadratic function?  $y=x^2-4x+5$  

•  $\frac{-\left(-4\right)\pm\sqrt{\left(-4\right)^2-4\left(1\right)\left(5\right)}}{2\left(1\right)}$  

•  $\frac{-\left(-4\right)\pm\sqrt{\left(-4\right)^2-4\left(-1\right)\left(5\right)}}{2\left(-1\right)}$  

What are the solutions to the quadratic function:  $y=x^2-4x+5$  

•  $-2\pm i$  
  

•  $2\pm i$  

•  $2\pm6i$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

What are the a,b, and c values for the function:  $y=x^2-5x+8$  

•  $a=1,\ b=5,\ c=8$  

•  $a=1,\ b=-5,\ c=8$  

•  $a=-1,\ b=-5,\ c=-8$  

Which is the correct set up of the quadratic formula for the function:  $y=x^2-5x+8$  

•  $\frac{-\left(-5\right)\pm\sqrt{\left(-5\right)^2-4\left(1\right)\left(8\right)}}{2\left(1\right)}$  

•  $\frac{-\left(-5\right)\pm\sqrt{\left(-5\right)^2-4\left(-1\right)\left(8\right)}}{2\left(-1\right)}$  

What are the solutions to the function:  $y=x^2-5x+8$  ?

•  $\frac{5\pm\sqrt{7}i}{2}$  

•  $5\pm\sqrt{7}i$  

•  $\frac{-5\pm\sqrt{7}i}{2}$  

Why is the highest exponent in this quadratic function a 2? $\left(x^2-2x+3\right)$  

• because it shows quadratics can have no more than 2 real or imaginary solutions. 

• because it describes how many times the parabola will cross the y-axis. 

• because it describes how many times a parabola turns.