Review 1

Factor completely.
k² -2k - 24

• (k+4)(k-6)
• (k+4)(k+6)
• (k+6)(k-1)
• (k-4)(k+6)

Factor completely: x²-6x+8

• (x-2)(x-4)
• (x-1)(x-8)
• (x+2)(x+4)
• (x+1)(x+8)

Factor completely: x²-13x+40

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

Solve the equation $\sqrt{x}=9$  

• x = 81

• x = 9

• x = 3

• x = 18

What would be the first step in solving the equation  $\sqrt{4x}=8$  

• square both sides of the equation

• take the square root of both sides

• divide both sides by 4

• multiply both sides by 8

Solve the equation  $\sqrt{x}+4\ =\ 10$  

• x = 36

• x = 196

• x = 100

• x = 84

Solve the equation  $\sqrt{5t\ +\ 1}=9$  

• t = 16

• t = 8/5

• t = 64/25

• t = 64

• x=-3

  x=7

• (x-3)

  (x+7)

• (x+3)

  (x-7)

• x=3

  x=-7

• (x+2)

  (x-4)

• x=2

  x=-4

• (x+2)

  (x-4)

• x=-2

  x=4