unit 9

Square Root

100

x²=100

x=+-10

200

4n²=81

n=+-9/2

300

(x+7)²+10=5

NO SOLUTION

400

2(p-4)²=50

p=9,-1

500

(n-4)²=10

n=7.16        n =0.84

Factoring

100

6x²-30x=0

X=0 X=5

200

4n²=81

n=+-9/2

300

x²+2x-31=4

x=-7 x=5

400

5r²+7r=-2

r=-2/5 r=-1

500

3b²-b-4=0

b=-1 b=4/3

Choose method

100

(x-2)²=25

x=7  x=-3

200

x²-2x-48=0

x=8 x=-6

300

3x²-10x+8=0

x=2 x=4/3

400

x²-2x-1=0

x=1+sqrt2   x=1-sqrt2

500

2x²+5x-3=x²+2x+1

x=1  x=-4

quadratic formula

100

x²-5x+6=0

x=2  x=3

200

x²-4x+5=0

NO SOLUTION

300

x²+3x-10=0

x=2  x=-5

400

x²-12x+27=0

x=9   x=3

500

2x²-10x+12=0

x=3  x=2