+0  
 
0
947
1
avatar+64 

Solve using zeros

 

y = x-7x+7

y = -2x-9x+10

 

Solve using square roots

 

2x+6 = 14

(x-1)+3 = 12

 

Solve by completing the square

 

x2 +6x = 7

x2 -4x = 10

 

Write in vertex form by completing the square

 

y = x2 +2x+1

y = -x2 -8x-15

 

Solve using any method. Round to the nearest hundredth.

 

y = x2 -3x+4

y = x+9

 

y = 2x2 -4x+7

y=9

 

y=x2

y=1

 

y = x2 -1

y = 1/2x-3

 May 21, 2016
 #1
avatar+9673 
0

I don't know any methods other than quad. eq. and sq. roots.

 

Solve using square roots

 

2x2 +6 = 14

2x2=8

x2=4

x = \(\pm2\)

 

 

 

 

(x-1)2 +3 = 12

(x-1)2 = 9

x-1 = \(\pm3\)

either x = 4 or x= -2

 

 

Solve using any method

y = x2-3x+4

y = x+9

x2 - 3x + 4 = x + 9

x2-4x-5 = 0

(x-5)(x+1) = 0

either x = 5 or x = -1

 

 

y = 2x2-4x+7

y=9

2x2-4x+7 = 9

2x2-4x-2 = 0

x2-2x-1 = 0

\(x = {-(-2) \pm \sqrt{(-2)^2-4(1)(-1)} \over 2(1)}\)\(1\pm\sqrt2\)

either x = 1+√2 or x=1-√2

 

 

y=x2

y=1

x2=1

x=\(\pm1\)

either x=1 or x = -1

 

\(y = x^2-1\)

\(y=\frac{1}{2x}-3\)

\(x^2-1=\frac{1}{2x}-3\)

\(x^3-x=\frac{1}{2}-3x\)

\(x^3+2x-\frac{1}{2}=0\)

x=  0.24283973258548086 or x=  -0.12141986629274043 + 1.4297651386824481i or

x=  -0.12141986629274043 - 1.4297651386824481i

 May 22, 2016

0 Online Users