Algebra 2 Quadratics Unit

What are the values for x that satisfy the equation

(x +2)(x+4)=0

• 2 and 4

• -2 and -4

• -2 and 4

• 2 and -4

• 2*4

If $x^2-14x=-49$ , then x could equal which of the following?

• 14 only

• 7 only

• -7 or 7 only

• -14 only

• -16 or 16 only

 Which of the following is a solution to: $x^2+6x=13$ ? 

•  $-3$  

• 4

•  $-3+\sqrt{22}$  

•  $-3-\sqrt{22}$  

 $y=x^2-9x+14$  What are the x-intercepts of the parabola with the given equation?

• 5, 2

• -5, -2

• -7, -2

• 7, 2

Solve the equation
 $x^2$  + 50 = 0

•  $\pm$  5i

• -5

• +5

•  $\pm$  25

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve the equation
 $2x^2\ -\ 3x\ +2$  

• 3 $\pm\frac{\sqrt{7}}{4}$  

• 3 $\pm\sqrt{7}$  

•  $\frac{3}{4}\pm\frac{i\sqrt{7}}{4}$  

• 3 $\pm\frac{\sqrt{-7}}{4}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

What is the discriminant?

• $\sqrt{b^2\ -\ 4\ ac}$

• $\sqrt{b^2-\frac{4ac}{2}}$

• $b^2\ -\ 4ac$

• $\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Tags

CCSS.HSA-REI.B.4B

What does a positive discriminant tell you?

• 1 real answer

• 1 complex answer

• 2 real answers

• 2 complex answers

Tags

CCSS.HSA-REI.B.4B

What does a negative discriminant tell you?

• 1 real solution

• 2 real solutions

• 1 complex solution

• 2 complex solutions

Tags

CCSS.HSA-REI.B.4B

What does a 0 discriminant tell you?

• 1 real solution

• 2 real solutions

• 1 complex solution

• 2 complex solutions

Tags

CCSS.HSA-REI.B.4B