EXTRA Review Problems for Unit 1B Test

Find the missing # by completing the square:

 $x^2\ +\ 12x\ +\$  ________

• 12

• 6

• 36

When solving by Completing the Square, what is the first step?

• Move the constant, then add blanks

• Find $\left(\frac{b}{2}\right)^2$

• Factor the left, Simplify the Right

• Square root both sides

Simplify:  $\sqrt{-100}$  

•  $10i$  

•  $-10i$  

•  $i\sqrt{100}$  

•  $i\sqrt{-10}$  

Simplify:  $\sqrt{-18}$  

•  $18i$  

•  $-18i$  

•  $i\sqrt{18}$  

•  $i\sqrt{-18}$  

Simplify:
 $2i^8\ +\ i\ -5i^2$  

•  $-3\ +\ i$  

•  $7\ +i$  

•  $-2i^{11}$  

Perform the indicated operation:
 $\left(1\ +\ 3i\right)+\left(4\ -\ 10i\right)$  

•  $5\ -\ 7i$  

•  $3\ -\ 7i$  

•  $5\ -\ 13i$  

•  $3\ +\ 13i$  

Perform the indicated operation:
 $6i\left(2\ +\ i\right)$  

•  $-6\ +\ 12i$  

•  $12i^2$  

•  $6\ -\ 12i$  

•  $18i^3$  

What part of the Quadratic formula is the discriminant?

• $-b\ \pm$

• $b^2\ -\ 4ac$

• $4ac$

• $b^2$