Unit 4 Review (Quadratics)

What is the factored form of x²-10x+24

• (x-4)(x-6)
• (x-12)(x+2)
• (x-8)(x-3)
• (x+24)(x-1)

What is the factored form of 25x²-9

• (5x+3)(5x-3)
• (x+5)(x-3)
• (x-3)(x+5)
• (5x+3)(3x+5)

Tags

CCSS.HSA.APR.C.4

Find the factors of 4x²-16x-9

• (2x-9)(2x+1)
• (2x+9)(2x-1)
• (4x-1)(x+9)
• (x+1)(4x-9)

What are the factors of x²+3x-40

• (x+10)(x-4)
• (x+8)(x-5)
• (x+20)(x-2)
• (x+1)(x-3)

Find the factors of x²-81

• (x-9)(x+9)
• (x+9)(x+9)
• (x-9)(x-9)
• Can't be factored

Tags

CCSS.HSA.APR.C.4

Find a, b, and c of this quadratic.

 $y\ =\ x^2\ +\ 3x\ -\ 8$  

• a = 1, b = 3, c = -8

• a = -1, b = 8, c = 0

• a = x, b = -3, c = 8

 $y\ =\ x^2\ +3x\ -\ 4$  

Will this parabola open upward or downward?

• upward

• downward

Tags

CCSS.HSF-IF.C.7A

Will the vertex of this parabola be a maximum or a minimum?

• maximum

• minimum

What is the formula to find the x-value of the vertex AND the axis of symmetry?

• $x\ =b^2$

• $x\ =\ -b$

• $x\ =\ \frac{-b}{2a}$

Find the axis of symmetry

 $x\ =\ \frac{-b}{2a}$  for  $y\ =\ x^2\ +\ 8x\ +\ 11$  

• x = 2

• x = -4

• x = 6