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Formulaes
Quadratics with Factoring
Foiling
XY Charts for Quadratics
100
What is this called?   U
A Parabola
100
How do you get the Y intercept?
Find C
100

Solve

X2-2X+1

(-1,-1)
100
(-x+5)(x-1)

-X2+4X-5

100

f(x)=4x2-3x+8

0,8

1,9 

2,18

200
How can you tell if a parabola will shift up?
If C is +/-
200
What is the Quadratic Formula?
Ax+Bx+C
200

3X2+7X+4

(3,4)
200
(x+8)(-x+12)

-x2+4x+96

200

f(x)=-2x2+5x-8

0,8

1.108,0

-1.108,0

300
How can you tell if the parabola will open up or down?
If A is +/-
300
What is the easy way to find what X is?
Factor 


300

12X2-5X+6

(-2,-3)
300
(-2x+6)(-x-18)

-2x2+30x-108

300

f(x)=-3x2-2x+1

1,0

2.1,-10.03

-2,-10.03


400
(15x-6)(-2x+12)

-30x2+192x-72

400
What is another way?
X and Y Charts
400

12X2-18X+6

(-12,-6)

400
(-10x+6)(x+9)

-102-84x+54

400

f(x)=4x2-7x+32

0,32

-2,34

2,34

500

(-43x-53)(-13x+90)

5592x2-3181x+4470

500
What is the long way to find X?

X= -b+/- the square root of B2 -4AC 

Over 2A


500

10X2-23X-33

(-33,10)
500
(-3x+12)(-x+15)

x2+33x+180

500
f(x)=12x2-15x+20
0,20

2,38

-2,38