Solving Quadratics

Solve by Factoring

100

x²-2x-48=0

x=8

x=-6

200

x²-8x=-7

x=7

x=1

300

6x²+18x = x - 12

x= -3/2

x= -4/3

400

8x²+16x=90

x= 5/2

x= - 9/2

Solve by Graphing

100

x²-2x = 48

x=8

x=-6

200

4x²+8x+7 = 4

x = -1/2

x = -3/2

300

5x²+7x=x²+2

x= 1/4

x= -2

400

9x²+10x-80 = x² - 6x + 10

x= 5/2

x= -9/2

Quadratic Formula

100

3x²+9x - 12=0

x=-4

x=1

200

x²-8x=-7

x=1

x=7

300

x²+7x = x - 10

no solution

400

x²+3 = 8x - x²

See Mrs. Myers

Grab Bag

100

Will this parabola be concave up or concave down? y= -2(x+4)²+6

concave down

200

Will this parabola be wide or narrow? y= -4x²-2x+7

narrow

300

What is the vertex of this parabola? y= 5(x-7)²+2

(7, 2)

400

What are the other three phrases that mean "solutions"?

x-intercepts, zeros, roots