10.1 Quiz Review

Solve by GRAPHING

100

Sketch a graph that has no solution 

See board 

200

If (4,0) and (-9,0) are the x intercepts on the graph of a quadratic function, which could represent the quadratic function? 

(x-4)(x+9)=0

300

Find the solution by graphing: 

x²+2x+1=0

x=-1 

400

Find the solution by graphing:

x²+8x+12=0

x=-2, x=-6

500

Find the solution by graphing: 

3x²-5x-3=0

x=-0.47, x=2.14

Solve by ZPP

100

(x+2)(x-1)=0

x=-2, x=1

200

7x(3x-4) = 0

x=0, x=4/3

300

What is the sum of the solutions to the equation 

(x+2)(x-7)=0

5 

Solve by FACTORING

100

4x² - 20x = 0

x=0, x=5

200

x² - 8x - 9 = 0

x=9,  x=-1

300

49x² - 100 = 0

x=10/7, x=-10/7

400

5x² - 3x - 2 = 0

x=1, x=-2/5

500

x(x+2) = -4x - 5

x=-1, x=-5

Solve by taking SQUARE ROOTS

100

x² - 7 = 29

x=6, x=-6

200

(x-3)² - 81 = 0

x=12, x=-6

300

3x² = 441

x = 7√3, x = -7√3

400

10 + 2(x - 1)² = 154

x=1±6√2

500

2(x−3)² - 8 = 10

x=0, x=6

Word Problems

100

The equation h = -16t² + 100 represents the height of an object dropped from 100 feet above the ground. How long would it take for the object to hit the ground?

2.5 seconds

200

The equation h = -16t² + 40 represents the height of an object dropped from 40 feet above the ground. How long would it take for the object to hit the ground?

1.58 seconds