Quiz Review: Quad Form & Solving by Factoring

Solve by taking the square root. 
16x²=81

• x=9
• x=9/4
• x= ± 9/4
• Cannot be solved. 

Solve by taking the square root. 
2x² - 32= 0

• x=32/2
• x=4
• x= ± 4
• x= ± 16

Solve by factoring: x² - 4x = 21 

• (x+3)(x-7)
• x = 3, -7
• x= -3, 7
• Cannot be solved. 

Solve by factoring: 25z² =81
*On the quiz you will have to show your factoring work!

• (5z+9)(5z-9)
• z= ±9/5
• Cannot be solved. 
• z= ±5/9

Solve by factoring: 2x² - 3 = - x

• Cannot be factored.
• x= -3/2, 1
• x= -1, 3/2
• (2x+3)(x-1)

Solve by factoring: -2x² + 4x= 0

• x=2
• x=0, 2
• x= -2
• -2x(x-2)=0

Use the quadratic formula to solve: 
3x² - 4x = 3
*On the quiz you will have to give the decimal and simplified radical. 

• A.
• B. 
• C.
• No Solution

When using the quadratic formula, when will your solution be "NO SOLUTION"

• When you get a negative answer.
• When you get a negative under the radical!
• You will always be able to get a solution. 
• When you get two answers that are negative. 

Given the following rectangle, with area indicated, determine the value of x.  
*You must be able to show how to factor and solve this. 

• -15/2 feet
• 6 feet
• 7.5 feet
• 8 feet