Finding Imaginary solutions PRACTICE

Which is a solution to (½)x² + 8 = 0

• - 4i
• 16i
• - 16i
• 1

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve: 

 $x^2=-64$  

• -8 and 8

• -8i and 8i

• (-√8) i and (√8) i

• -√8 and √8

Solve by taking square roots:

k² + 6 = -43

• k = i√37

• k = 37i or - 37i

• k = 7i or k = -7i

• k = 7 or k = -7

Solve By Square Roots:

 $5v^2+2=-5$  

•  $\pm\sqrt{\frac{7}{5}}$  

•  $\sqrt{\frac{7}{5}}$  

•  $\pm i\sqrt{\frac{7}{5}}$  

•  $\pm i\sqrt{\frac{3}{5}}$  

Tags

CCSS.HSA-REI.B.4B

Solve using square roots.

7b² + 4 = -59

• b = 9, b = -9

• b = 3i, b = -3i

• b = 8i, b = -8i

• b = 3, b = -3

Solve:  

 $16x^2+9=0$  

•  $\pm\frac{3}{4}i$  

•  $\pm\frac{3}{4}$  

•  $\pm\frac{9}{16}i$  

•  $\pm\frac{9}{16}$  

Solve by taking the square root:
 $2\left(x-3\right)^2+14=-18$  

•  $\pm7i$  

•  $3\pm4i$  

•  $-3\pm4i$  

• -1 or 7

Solve.  
x² +12 = 5

• x = ± 49
• x = ± i√7
• x = ± √7
• x = ± 3.5i

Tags

CCSS.HSA-REI.B.4B

 $3x^2=-48$  

Solve for x.

• x = ± 4i

• x = ± 12i

• x = ± 4

• x = 6 or -6

Solve for x.

(x - 4)² - 8 = -33

• $\pm9i$

• $4\pm5i$

• -1 or 9

• 3 or 11

• $\pm i$