Unit 1 Day 2: Review of Absolute Value

Unit 1 Day 2: Review of Absolute Value

Algebra 2 A - Giesting

Objective

• Students will review the definition of absolute value

• Students will review the process of solving an equation involving absolute value

Multiple Choice

Evaluate |10|

• 10

• -10

• 11

• -11

Multiple Select

What are all the possible solutions of |x| = 15?

• 15

• -15

• 20

• -20

Solving Absolute Value Equations

• Since there are 2 sides to zero, every absolute value equation should have 2 solutions.

• To solve, set the expression inside the absolute value to the positive and negative

Multiple Select

Which 2 equations would be used to solve |3x - 1| = 10? Check all that apply.

• 3x - 1 = 10

• -3x + 1 = 10

• 3x -1 = - 10

• 3x+1 = 10

• 3x +1 = - 10

Multiple Select

What are all the solutions of |4x + 5| = 25

• -5

• 5

• $\frac{15}{2}$
  

• $\frac{-15}{2}$
  

Solving Absolute Value Equations with Variables on Both Sides

• We do something similar to what we do with regular absolute value equations.

• Write 2 equations, one for the positive and one for the negative