Review over Week 2

The standard form of a quadratic function is

• y = ax² + bx + c

• a(x - h)² + k

• y - y₁ = m(x - x₁)

• Ax + By = C

If a is negative in the quadratic function, which way does the parabola open?

• up

• down

• left

• right

Identify a, b, and c if y = +3x² +5x - 8

• a=3, b=5, c= - 8

• A=3, B=-8, C=5

• A=3x², B=5x, C=-8

• A=3x² , B=-8, C=5x

What is the Greatest Common Factor of the following polynomial?
12t³ + 30t² + 48t

• 12t
• 6t³
• 6t
• 12t³

What is the GCF of 18k and 15k³

• 3k²
• 3k³
• 3k
• 5k

Factor
r² -16r + 60

• (r - 15)(r + 4)
• (r - 6)(r + 10)
• (r - 6)(r - 10)
• (r +30)(r - 2)

Find the zeros of this quadratic.

• b=4/5, b=3
• b=4, b=-3
• b=1/5, b=3
• b=4/5, b=-3

Solve
2x² + 17x + 21 = 0

• x= ^-21/₂, -17
• x= ²/₃, 16
• x=-7, ^-3/₂
• x=15, -³/₇

Solve by taking the square root:

x² = 49

• -7

• 7

• 49

• ±7

x² -4 = 77

• 9

• -9

• No Real Solutions

• ±9