Ch 3 Review - ALL Methods for solving quadratics

Solve
x² + 2x - 24 = 0

• x = -6, x = 4
• x = 6, x = -4
• x = 12, x = -2
• x = 8, x = -3

Tags

CCSS.HSA-REI.B.4B

Which of the following equations matches standard form of a quadratic?

• ax + by = c
• y = a(x - h)² + k
• y = ax² + bx + c
• y = mx + b

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.2

What is the first step to solving THIS equation by completing the square?

x² + 10x + 21 = 0

• Set the equation equal to zero

• Divide 10 by 2 and add the result to both sides

• Add a² and 10a together

• Subtract the 21

Factor

 $x^2-400$  

• ( x - 200) ( x + 200) 

• ( x + 20) ( x + 20) 

• Prime/can't factor

• ( x - 20) ( x + 20) 

The discriminant is

• aX²  + bX  +  c
• b - 4ac
• b² - 4ac
• b² + 4ac

Tags

CCSS.HSA-REI.B.4B

____________
For the function above, is the discriminant positive, negative, or zero?

• Positive
• Negative
• Zero
• Not Sure

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

What is the discriminant of 6x² − 2x − 3 = 0

• 76

• 29

• 68

• none of these

Tags

CCSS.HSA-REI.B.4B

• x= ±81

• x= ±9

• x= ±3

• No real solution

If the discriminant is negative, then the solution will be

• one real solution

• two real solutions

• two complex solutions

• one imaginary solution

If the discriminant is positive, then the solution will be

• one real solution

• two real solutions

• two complex solutions

• one imaginary solution