unit 9

Factoring

100

(n-6)(n+7)=0

n=6 or n=-7

200

p(p-3)=0

p=0 or p=3

300

(4p-5)(p+2)=0

p=5/4 or p=-2

400

3b^2-b-4=0

b=4/3 or b=-1

500

x^2+2x-31=4

x=-7 or x=5

square root

100

x^2=100

x=10 or -10

200

(x+2)^2=49

x=5 or x=-9

300

(x+1)^2-5=44

x=6 or x=-8

400

(n-4)^2=10

n=7.16 or n=0.84

500

2(p-4)^2=50

p=9 or p=-1

quadratic formula

100

4x^2+11x+6=0

x=-3/4 or x=-2

200

2m^2+9m+11=0

no solution

300

2b^2+5b-2=6b

x=1.28 or x=-0.78

400

n^2-12n=-22

x=9.74 or x=2.26

500

2x^2+10x=1.02

x=0.1 or x=-5.1

choose method

100

3x^2-2x=10

x=2.19 or x=-1.52

200

6x^2-32x=0

x=0 or x=16/3

300

x^2-16x=-63

x=7 or x=9

400

4x^2-25=0

x=5/2 or x=-5/2

500

5x^2-11x+2=0

x=1/5 or x=2