Quadratic Equations

Solve By Graphing

100

x²-4=0

x=-2,2

200

x²+2x-8=0

x=-4,2

300

2x²-3=5x

x=-0.5,3

400

x²=-x-1

No solutions

500

x²=6x-7

x=1,5

Solve By Factoring

100

x²-6x+9=0

3

200

x²-x-12=0

4,-3

300

x²+6=-5

-2,-3

400

2x²+7x+3=0

-0.5,-3

500

-3x²=-14x-5

-1/3,5

Solve By Formula

100

x²-2x-1=0

2.41,-0.41

200

2x²+3x=1

0.28,-1.78

300

x²+6x+3=2

-0.17,-5.83

400

5x-6=-4x²

0.75, -2

500

3x²+1=7x

2.52,0.15

Solve By Choice

100

x²-5x+6=0

2,3

200

2x²+3=7x

1/2, 3

300

3x²+4x-7=0

1, -7/3

400

-3x²=-5x-2

-1/3, 2

500

5x²+1=-6x

-1/5, -1

Riddles

100

I have cities but no houses. I have mountains but no trees. I have water but no fish. What am I?

map

200

The more you take, the more you leave behind. What am I?

footsteps

300

I am tall when I am young but short when I am old. What am I?

a candle

400

What has keys but cannot open locks?

Piano

500

I am not alive but I grow; I don't have lungs but need air; I don't have a mouth but water kills me. What am I?

fire