Solving Quadratic Equations

What are the factors of

 $4x^2-\ 6x\ =\ 0$  ?

• x(4x - 6) = 0

• 2x(2x - 3) = 0

• 4x(x - 2) = 0

• 4x(x - 6) = 0

Find the roots of the quadratic equation

 $4x^2-\ 6x\ =\ 0$  .

• 0 or  $\frac{4}{6}$  

• 0 or  $\frac{3}{2}$  

• 0 or 2

• 0 or 1

Solve:

 $x^2\ +\ 12x\ +\ 36\ =\ 0$  .

• 6

• -6

• 6, -6

• no real roots

Find the roots of the quadratic equation  $3x^2\ -\ 75\ =0?$  

•  $\pm75$  

•  $\pm25$  
  

•  $\pm5$  

•  $\pm3$  

Solve the equation

 $x^2\ -\ 14x\ +\ 24\ =\ 0.$  

• -12, -2

• -6,-4

• 4, 6

• 2, 12

Factor

 $x^2\ -\ 3x\ -\ 18$  .

• (x + 6)(x + 3)

• (x - 6)(x - 3)

• (x -6)(x + 3)

• (x + 6)(x - 3)

Solve for x:

 $x^2\ -\ 3x\ -\ 18\ =\ 0$  

• 3, 6

• -6, 3

• -3, 6

• -6, 3

Factor

 $x^2\ +\ 2x\ -\ 48$  .

• (x + 6)(x + 8)

• (x - 6)(x - 8)

• (x + 6)(x - 8)

• (x + 8)(x - 6)

Solve

 $x^2\ +\ 2x\ -\ 48\ =\ 0$  . 

• 6, 8

• -6, 8

• -8, -6

• -8, 6

What are the roots of the quadratic equation

 $3x^2\ +\ 4x\ \ \ \ -\ 15\ =\ 0$  ?

• 3, -5

• -3, 5

• 3,  $\frac{-5}{3}$  

• -3,  $\frac{5}{3}$