QUIZ 2.3 Factoring and Solving Quadratics by Factoring

What is the GCF?  $3x^{ }y^2-27x^2y$  

Factor completely:

 $x^2+x-42$  

Factor completely:

 $x^2-49$  

 $6x^2+x-2$  

Factor completely:

 $3x^2+24x+48$  

Factor completely:

Solve: $x^2-5x+6=0$  ;

 x = ___________

Solve:  $x^2+16x+26=0$  

x = ______________

Solve:  $2x^2+9x=5$  
x = ___________ (no decimals)

A rocket is launched from a platform. Its height (in meters), x seconds after the launch, is represented by   $h\left(t\right)=-5x^2+20x+60$  . How many seconds after launch will the rocket hit the ground? 

Factor  $x^2+8x-20=0$  , then solve.

• (x + 10)(x - 2); x = 10, -2

• (x - 10)(x + 2); x = 10, -2

• (x + 10)(x - 2); x = -10, 2

• Not factorable