quadradic games

solve using square roots

100

X²= 49

X= +-7

200

X²-3= 95

+- 7 square root of 2

300

3/4x²+1= 31

X= +-2square root of 10

400

X²= 225

X = {-15,15}

500

9x²= 25

X= {-5/3, 5/3}

Solve by factoring

100

x²+7= 88

X= {-9,9}

200

10x²-25= x²

x= {+-5/3}

300

12x²= -8x

X= -2/3

400

2x²+80= 26x

x= {5,8}

500

4x²+5x+1=0

X= {-1,-1/4}

Solve using quadratic formula

100

-6x-40=0

X= {-4,10}

200

2x² -4x= 3

{1+- square root of 10}

300

-x²-3x+9= 0

{0, -3}

400

x²+15x= 6x

X = {-18,0}

500

x²+12x-24= 0

X= {-6+- square root of 59/1}

Solve by completing the square

100

X²-14x+49=0

X=7

200

x²-18x+65= 0

X= {5,13}

300

3x² -36 =12x

{6+-6 square root of 2}

400

x²+16x+55= 3

X= {-8+-2 square root of 3}

500

2x²+9x= x-14

undefined

Bonus

100

what is the formula for the discriminant

D= b² -4(a)(c)

300

if the area of a rectangle is 108 meters and the height is x-3 but the width is x what is the value of x

X = 12

400

finf the vertex of x²+10x+26

(-5,1)

500

Find the vaule of a rectangle with a width of 

(x+7) and a height of (x-1) the total area of the rectangle is 84

x = 7