Review 9.1 to 9.3

Review 9.1 to 9.3

Multiple Choice

What are the solutions?

• -2, 1
• 1, 2
• -1,2
• 0,-4

Multiple Choice

How many solutions does this function have?

• two

• one

• all real numbers

• no real solutions

Multiple Choice

What are the solutions of this graph?

• -2 and 3
• -1/2 and -6
• -2 and -6
• 3 and -6

Multiple Choice

Solve by factoring:
 $x^2+10x+24=0$ 

•  $x=6\ or\ x=4$  

•  $x=\pm\sqrt{14}$  

•  $x=-6\ or\ x=-4$  

• No real solutions

Multiple Choice

What is the equation for this parabola in factored form?

• y=(x+2)(x-1)

• y=(x-2)(x+1)

• y=(x-2)(x-1)

• y=(x+2)(x+1)

Multiple Choice

Solve by factoring:
 $x^2+2x-15=0$ 

•  $x=3\ or\ x=-5$  

•  $x=\pm\sqrt{13}$  

•  $x=-3\ or\ x=5$  

• No real solutions

How to simplify a radical

Simplify:

 $\sqrt{48}$  
1.  Find the largest perfect square that divides into number
2.  Rewrite square root as a product
3.  Take out perfect square and leave other number underneath radical

Multiple Choice

Simplify

 $\sqrt{24}$  

•  $4\sqrt{6}$  

•  $2\sqrt{6}$  

•  $6\sqrt{2}$  

•  $6\sqrt{4}$  

Multiple Choice

Simplify:

 $\sqrt{98}$  

•  $7\sqrt{2}$  

•  $2\sqrt{7}$  

•  $49\sqrt{2}$  

•  $2\sqrt{49}$  

Multiple Choice

√243

• 3√3
• 9√3
• 81√3
• 3√81

What if you have a number on the outside?

Simplify:

 $6\sqrt{75}$  
1.  Start the same - find largest perfect square.
2.  Rewrite as a product.
3.  Take out perfect square --> MULTIPLY it by the number on the outside

Multiple Choice

Simplify:

 $\sqrt{x^{15}}$  

•  $x^{7.5}$  

•  $x^{14}\sqrt{x}$  

•  $x^7\sqrt{x}$  

Multiple Choice

Simplify:

 $3\sqrt{125}$  

•  $75\sqrt{3}$  

•  $8\sqrt{5}$  

•  $15\sqrt{5}$  

•  $15\sqrt{25}$  

Multiple Choice

-3√80a⁷

• 4a³√5a
• -12a³√5a
• -3a³√5a
• -48a³√5a

Multiple Choice

√45x⁴y⁷

• 3x²y³√5
• 9x²y³√5y
• 3x²y³√5y
• 3x⁴y⁷

Multiple Choice

√75x²

• 5x²√3
• 5x
• 5x√3x
• 5x√3

Multiple Choice

√121v

• 11v
• 11√v
• 11v√v
• √11v