Math 3B Lessons Review

How many solutions are there to the equation 2x² - 8 = 0 ?

Why ?

• 8 : it's a polynomial

• 2 : it's quadratic

• 4 : it's quartic

• 1 ; it's linear

• 0 : there is no solution

• (10,2)

• (2,12)

• (14,2)

• (12,2)

If x = -2, what is the value of 2x²y + 3xy + 4 = ?

• 6

• 2y+4

• 18

• 4y+4

• -2y+4

Choose the irrational number

• Rational

• Irrational

Which of the following equals 0.121212.....?

• 2/9

• 1/3

• 1/11

• 6/11

• 4/33

Irrational Numbers....

• cannot be represented as a simple fraction
• can be represented as a fraction
• can be a repeating decimal

Simplify the following radical: √24

• 2√6
• 4√6
• 2√12
• 3√8