SOLVE QUADRATIC EQUATIONS

Solve by factoring 
 $x^2+12x+35=0$  

• x = - 5 or x = - 7

• x = 5 or x = 7

• x = - 35 or x = - 1

• x = - 9 or x = - 4

What is the solution for  $4x^2+4x+1=0$  ?

•  $x=\frac{1}{2}or\ x=-\frac{1}{2}$  

•  $x=-\frac{1}{2}and\ x=-\frac{1}{2}$  

•  $x=\frac{1}{2\ }and\ x=\frac{1}{2}$  

•  $x=\frac{1}{4}or\ x=1$  

Solve

 $x^2-10x+25\ =0$  

• x= 0 ; x= 5

• x = 5

• x = 0

Solve

 $2x^2-5x-3=0$  

•  $x=-\frac{1}{2};\ x=3$  

•  $x=\frac{1}{2};\ x=3$  

•  $x=\frac{1}{2};\ x=-3$  

•  $x=-\frac{1}{3};\ x=2$  

Solve

 $x^2+2x=15$  

•  $x=-5;\ x=3$  

•  $x=5;\ x=3$  

•  $x=-5;\ x=2$  

•  $x=-5;\ x=-3$  

Solve

 $x^2+4x=0$  

•  $x=4;\ x=0$  

•  $x=-4;\ x=1$  

•  $x=4;\ x=-1$  

•  $x=-4;\ x=0$  

Solve

 $2x^2-6x=8$  

•  $x=1;\ x=-4$  

•  $x=-1;\ x=4$  

•  $x=-2;\ x=2$  

•  $x=-1;\ x=2$  

Solve

 $7x^2-105=0$  

•  $\ x=\sqrt{15}$  

•  $x=-\sqrt{7};\ x=\sqrt{15}$  

•  $x=-\sqrt{15};\ x=\sqrt{15}$  

•  $x=15;\ x=-15$  

Solve

 $8x^2-288=0$  

•  $x=6;\ x=-6$  

•  $x=6;\ x=-8$  

•  $x=\sqrt{6};\ x=-\sqrt{6}$  

•  $x=\sqrt{8};\ x=-\sqrt{8}$  

A smoke jumper jumps from a plane that is 1284 ft about the ground. The function

 $y=-16t^2+1284$  gives the jumper's height y in feet at t seconds. How long is the jumper in free fall if the parachute opens at 500 ft?

• 7 seconds

• 5 seconds

• 8 seconds

• 7.5 seconds