Introduction to rational
algebraic expression
What are Rational
Algebraic Expressions?
Steps in Determining the
Excluded Values
Application in Real Life
Situations
TEACHER GRACE YOUTUBE CHANNEL
1
Polynomials
Q is NOT equal to 0
2
Check these expressions
B.
−2
2𝑥 (−3)
5 𝑥
3
Steps in Determining the
Excluded Values:
undefined
4
Step 1: Let the expression in
the denominator be equal to
0.
𝑥−3=0
5
Step 2: Solve the equation to
determine the value/s of the variable.
𝑥−3=0
𝑥−3+3=0+3
𝑥=3
6
What will happen if x = 3?
undefined
7
Example 2
undefined
8
Step 1: Let the expression in
the denominator be equal to
0.
2
𝑛
+ 𝑛 − 2=0
9
Step 2: Solve the equation to
determine the value/s of the variable.
n+2 − 2 = 0 − 2
𝑛 = −2
n −1 + 1 = 0 + 1
𝑛=1
10
What will happen if n = -2 or
1?


undefined
11
Application in real-life
Application in real-life
Time (in
hours)
Vannessa
x
Ryan
y
𝒑𝒂𝒓𝒕 𝒐𝒇 𝒘𝒐𝒓𝒌
𝒉𝒐𝒖𝒓
1
𝑥
1
𝑦
What are Rational
Algebraic Expressions?
Steps in Determining the
Excluded Values
Application in Real Life
Situations
14