Solving Quadratics

Graphing

100

f(x)= x²+2x-3

x= 1,-3

200

f(x)=x²-4x-5

x=1,5

300

f(x)=-x²+15x-56

x=7,8

400

f(x)=x²-8x+16

x=4,0

500

f(x)=2x²-8

x=0,-8

Factoring

100

x²+9x=0

x=0,-9

200

x²-4=0

x=-2,2

300

x²-10x+21=0

x=7,3

400

6x²+5x-4=0

x=-4/3, 1/2

500

x²+8x-65=x-5

x=12,-5

Square Roots

100

x²-64=0

x=-8,8

200

7x²+8=15

x=±1

300

(x+2)²+49

x=5,-9

400

-2(x+7)²=-40

x=-7±2√5

500

-1/2x²+1=-39

x=±4√5

Complete the square

100

x²=16x-63

x=8±√1

200

x²+14x+49=4

x=-5,-9

300

x²+8x-34=0

x=-4±5√2

400

2x²-16x+8=0

x=4±2√3

500

2x²-20x+89=-87

x=-5±√67

Quadratic Formula

100

x²+12x-8=0

x=-3,-9

200

-x²+2x=1

x=1

300

-2x²+24=8x

x=6,12

400

3x²+5x=8

x=1,16/6

500

7x²-10x+9=5-2x

x= 8±i√48 / 14