Algebra Quadratic Equations Review

√48

• 4√2
• 6√3
• 4√3
• 4√2

Simplify √-4

• 2i
• -2i
• 2
• 4i

What does i² =  ?

• 1
• -1
• √-1
• √1

Simplify √-28

• -√28
• -2i√7
• 2i√7
• 28i

What should you do first in solving this equation?

x² + 6x - 13 = 3

• Factor

• Write down: a = 1, b = 6, c = -13

• Subtract 3 from both sides.

• Add 3 to both sides.

 $For\ 2x^2\ -\ 4x\ +\ 3\ =\ 0,\ which\ is\ correct?$  

•  $\frac{4\ \pm\sqrt{-16\ -4\left(2\right)\left(3\right)}}{2\left(2\right)}$  

•  $\frac{-4\ \pm\sqrt{16\ -4\left(2\right)\left(3\right)}}{2\left(2\right)}$  

•  $\frac{4\pm\sqrt{16-4\left(2\right)\left(3\right)}}{4}$  

•  $\frac{4\pm\sqrt{40}}{4}$  

Solve

 $2x^2+4x\ +10=0$  

Write your answer in exact form (simplified)

•  $-4\ \pm8i$  

•  $-1\pm2i$  

•  $\frac{-4\ \pm8i}{4}$  

•  $\pm8i$  

Multiply: 
(4 – 3i)(-7 – 2i)

• A.  -23 + 13i
• B.  -23 - 29i
• C.  -34 + 13i
• D.  -34 - 29i

Find the sum.
(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

Calculate:
(4 − 7i) − (-3 + 6i)

• 7 − 13i
• 7 − i 
• 1 − 13i
• 1 − i