Quadratics Complex Solutions

What is the discriminant of 4x^2+8x+6=0 AND what type of solutions does it have?

• -32; 2 complex roots

• 32; 2 irrational roots

• 160; 2 irrational roots

• 16; 2 rational roots

Tags

CCSS.HSA-REI.B.4B

Solve x² - 5x + 10 = 0

• (5 - i√15)/2  ,  (5 + i√15)/2

• (5 - √15)/2  ,  (5 + √15)/2

• (5 - i√65)/2  ,  (5 + i√65)/2

• (5 - √65)/2  ,  (5 + √65)/2

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

What are the zeros of the function f(x) = x² + 64?

• -8 and 8

• -8i and 8i

• (-√8) i and (√8) i

• -√8  and √8

How many solutions would a quadratic have if D < 0?

• 2 Complex Solutions

• 1 Real Solution

• 2 Real Solutions

Tags

CCSS.HSA-REI.B.4B

• A
• B
• C
• D

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

• A
• B
• C
• D

If b²-4ac is negative, the quadratic equation has:

• Two real solutions that are different

• Two imaginary solutions that are different

• A real double solution

• An imaginary double solution

Tags

CCSS.HSA-REI.B.4B

How does the quadratic equation show that there should be two complex solutions?

• b²

• ±

• b² - 4ac

• 2a

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Find the roots of the equation.

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

• ±72
• ±12
• 12
• No real solution

Tags

CCSS.8.EE.A.2