Quadratic formula/discriminant

Solve using quadratic formula

 $3x^2+6x+3=0$  

• x = -1

• x = 1,3

• x = 3

• $x=-1\pm\sqrt{3}$

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic equation
 $2x^2+4x=30$  

• x = -3, 12

•  $x=-5\pm\sqrt{3}$  

•  $x\ =\ \pm\sqrt{5}$  

• x = 3, -5

Tags

CCSS.HSA-REI.B.4B

Solve equation using quadratic equation

2x² + 3x- 4 = 0

• $x=\frac{3\pm\sqrt{7}}{5}$

• $x=\frac{-3\pm\sqrt{41}}{4}$

• $x=\frac{-4\pm\sqrt{29}}{5}$

• $x=\frac{2\pm\sqrt{29}}{3}$

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic equation

x² - 14x = -49

• x = 1

• x = 2

• x = 7

• x = 21

Tags

CCSS.HSA-REI.B.4B

Solve equation using quadratic formula

x² + 6x + 15 = 0

• $x=3\pm i\sqrt{6}$

• $x\ =\ -3\pm6i$

• $x=3\pm6i$

• $x\ =\ -3\pm i\sqrt{6}$

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

 $4x^2-4x-24=0$  

Solve using the quadratic formula

• x = 0, 2

• x = -2, 3

• x = 2, 5

• x = 1, 4

Tags

CCSS.HSA-REI.B.4B

Solve equation using quadratic equation

-4x² + 3x = -5

• $x=\frac{3\pm\sqrt{89}}{8}$

• $x=\frac{3\pm\sqrt{5}}{8}$

• $x=\frac{-3\pm\sqrt{89}}{8}$

• $x=\frac{-3\pm\sqrt{29}}{8}$

Tags

CCSS.HSA-REI.B.4B

Solve equation using quadratic formula
 $x^2-12x+6\ =\ 0$  

•  $x=3\pm2\sqrt{5}$  

•  $x=6\pm\sqrt{30}$  

•  $x=-3\pm3\sqrt{2}$  

•  $x=-5\pm\sqrt{15}$  

Tags

CCSS.HSA-REI.B.4B

Solve equation using quadratic formula
 $3x^2+2x+5=0$  

•  $x=\frac{2\pm i\sqrt{14}}{ }$  

•  $x=\frac{1\pm2i\sqrt{3}}{3}$  

•  $x=\frac{-1\pm i\sqrt{14}}{3}$  

•  $x=\frac{-2\pm2i\sqrt{3}}{3}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve equation using quadratic equation

 $-5x^2-6=-4x$  

•  $x=\frac{2\pm\sqrt{13}}{5}$  

•  $x=\frac{4\pm\sqrt{26}}{5}$  

•  $x=\frac{4\pm i\sqrt{13}}{5}$  

•  $x=\frac{2\pm i\sqrt{26}}{5}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7